There are a couple points:
1) those QBs all improved significantly as they gained more experience, something Tebow could do as well
2) those QBs all could not match Tebow in terms of avoiding picks and extending/creating plays with their legs.
Not saying Tebow is going to be in their class. Just saying that he has some skills that add to his value and that his future as a passer is not already defined, just as it would have been wrong to conclude that Peyton Manning was going to be a failure bc he threw 28 picks as a rookie.
As for Tebow being a "historically inaccurate passer," take a look at his college stats next to Manning's. We scout And project QBs all the time based on their college performance. Why is Tebow different? Because he throws kind of funny?
He could and will improve, that's for sure. He has to. One thing I didn't note before, not only is he last in the league right now, his 48.6% would be the worst in the last decade among qualified QBs. All this despite being in the most favorable environment that QBs have ever seen. His completion percentage is historically low. There isn't much disputing that.
Tebow is different because he's got a professional track record to go off of. And scouts. Which actually do matter. A funny throwing motion isn't the only reason people don't think much of his ability as a passer. Philip Rivers has a funny throwing motion and was extremely successful in college, and until this year, he was seen as one of the top QBs in the league over the last half decade.
QB success in college doesn't always mean QB success in the NFL. Here's a list of the top passers (by total yards) all time in college:
1. Timmy Chang, Hawaii: (2000-2004) 17,072 yards
2. Graham Harrell, Texas Tech (2005-2008)
3. Ty Detmer, BYU: (1988-91) 15,031
4. Colt Brennan, Hawaii: (2005-07) 14,193
5. Case Keenum, Houston: (2007-present) 13,586
6. Philip Rivers, North Carolina State: (2000-03) 13,484
7. Colt McCoy, Texas: (2004-2008) 12,253
8. Kevin Kolb, Houston: (2003-06) 12,964
9. Dan LeFevour, Central Michigan: (2006-2009) 12,905
10. Tim Rattay, Louisiana Tech: (1997-99) 12,746
Wow. Not exactly a murderer's row, is it? Here's a list of the top passers by TDs all time in college:
1. Colt Brennan Hawaii: 131 touchdown passes (2005-07)
2. Ty Detmer BYU: 121 (1988-91)
3. Timmy Chang Hawaii: 117 (2000-04)
4. Tim Rattay Louisiana Tech: 115 (1997-99)
5. Danny Wuerffel Florida: 114 (1993-96)
6. Chad Pennington Marshall: 100 (1997-99)
7. Matt Leinart USC: 99 (2002-05)
8. Kliff Kingsbury Texas Tech: 95 (1999-02)
9. Philip Rivers North Carolina State: 95 (2000-03)
10. Brady Quinn Notre Dame: 95 (2003-06)
Not looking much better. Outside of McCoy (still a work in progress), only Rivers and maybe Pennington have had sustained success at the professional level. Clearly, college success does not always equal NFL success. In the last 20 years, a QB has won the Heisman 12 times. Of those 12, 7 have thrown for 15 career TDs or less in the NFL. 3 of them never played a down in the NFL. Comparing Tebow's college stats to Manning's college stats aren't all that useful when you consider that college stats (even college awards) are far from the only indicater of success at the professional level.
A note about interceptions vs completion percentage: Players can, and have, come back from throwing a lot of picks to have great careers. Interceptions are flukier then flat out innacuracy. Look at Brady, who is arguably playing better than last year, yet has seen his interception rate nearly triple. Here's a list of QBs who finished last in completion percentage over the last decade, with teams winning percentage in parentheses:
2011: Tebow, 48.6 (8-6)
2010: Derek Anderson, 51.7 (5-11)
2009: Jamarcus Russell, 48.8 (5-11)
2008: Derek Anderson, 50.2 (4-12)
2007: Kellen Clemens, 52.0 (4-12)
2006: Vince Young, 51.5 (8-8)
2005: JP Losman, 49.6 (5-11)
2004: Mark Brunell, 49.8 (6-10)
2003: Kordell Stewart, 50.2 (7-9)
2002: Joey Harrington, 50.1 (3-13)
Here's a list of QBs who finished last in interceptions over the last decade:
2011: Ryan Fitzpatrick, 19 (5-9)
2010: Eli Manning, 25 (10-6)
2009: Jay Cutler, 26 (7-9)
2008: Brett Favre, 22 (9-7)
2007: Jon Kitna, 20 (7-9)
2006: Ben Roethlisberger, 23 (8-8)
2005: Brett Favre, 29 (4-12)
2004: Vinny Testaverde, 20 (6-10)
2003: Marc Bulger, 22 (12-4)
2002: Daunte Culpepper, 23 (6-10)
Which list would you rather be associated with? Neither is great, but one is a laundry list of the worst starting QBs of the last decade, the other includes some inconsistent but occasionally excellent players. There is a lot of luck and decision making involved in interceptions. Players can substantially improve their decision making and luck comes and goes. A poor completion percentage (due to the much larger sample size) is pretty representative of an innacurate QB. On top of that, a high interception rate is bad for a team's record (74-84, .468), but a low completion percentage (55-103, .348) is far worse.
Way too long of a post for a game thread, but oh well. It isn't just because he looks funny, or because he is loudly religious. People think Tebow is a poor passer because he is historically bad at getting the ball into his receivers' hands. In the past, players who were this bad at hitting targets tended to not last very long in the NFL. He's a great runner, appears to be a strong leader, and doesn't make a ton of mistakes. He's also an awful passer.