Michigan ranks 12th in current NFL players. You can see that here, just sort by Active. Sadly I expect them to slip further down the list in coming years.
FWIW, USC, Ohio, and and The U all had legitimate booster scandals in the last decade and I'd bet that Georgia and LSU had some "help" too, they just aren't as egregious or are better at hiding it. Regardless, being in the top 10 of active NFLers is a great thing and I think it gets the point across to recruits that UM is an NFL feeder. Whether your #1 at a given time doesn't really matter (UT's program is at a relative low point right now). In other words, once a school has established itself in the top 10 for NFLers, other factors (e.g. geography, coaches, etc.) separate relative recruiting pitches.
I'm not so sure I agree with your belief that UM wont get some NFLers in the next few years. Martin, Molk, and maybe Hemmingway, RVB, Stonum, and Koger get drafted or make a practice squad this year. Next year, Floyd, Denard, Demens, Omameh, and Roh all have a good shot and there's a few other guys that have an outside chance (BWC, Barnum, Rountree, and a couple others). After that it gets too hard to project IMHO, but at the very least there's some serious talent in Lewan, Fitz, and Countess (and hopefully Gardner and another lineman or 2).
It wont be as good as the "golden years" years from 04-06 (Henne, Hart, Long, Breaston, Avant, Branch, Braylon, Mario, Arrington, Breaston, Graham, Woodley, Baas, Burgess, Crable, Hall, Harris, Marlin Jackson, *Mundy, Trent, Woods) which is just absurd (seriously, DAYUM) and probably accounts for over half of UM's active NFLers (~15/26), but it should keep the pipeline flowing until Hoke gets his jumbo (read: prototypical NFL) recruits going.