I don't believe they're in HD on Comcast, or at least I can't find them. I'm so glad that the US-Canada hockey game won't be in HD.
As Napkin stated, they are in HD. However, I'm absolutely amazed that the game isn't on NBC itself. Sunday night, 7pm, it's a perfect chance to show a huge USA game with a bunch of recognizable stars, for the sport that NBC FUCKING BROADCASTS DURING THE SEASON. I understand why the majority of the games are on CNBC, especially since the USA games are at 3, but USA - Canada on a Sunday night? That should 100% be on the main network.
Hockey rant over. Overall, I really haven't watched much of the main network. I've spent infinitely more time watching curling and hockey on CNBC than anything on NBC itself. The best I've seen was on Sunday afternoon, when a majority of the over-produced crap was on the backburner, and they were showing stuff like Nordic combined. I've never really watched cross-country skiing, but the anouncers were enthusiastic and informative, and the ending was incredibly dramatic. That's how it should be done.
During the week, I've found the primetime broadcasts I have watched to be disjointed and lacking in drama as a result. They don't seem to set up a lot of the events, mainly because they're pretending they're live when they really aren't. Hell I blinked and men's downhill race was done with pretty much no fanfare. I can't really put my finger on why it seems so out of whack, but I can't get engrossed in any of the obviously tape-delayed events, even if I don't know the results.
As for last night, that was great. I was watching without sound at a bar, but saw the majority of the events. The women's downhill was great, Shaun White was incredible, and the short track stuff is always entertaining. All of this was without sound. NBC needs to get out of its own way and let the athletes tell the story during the competitions. That's more entertaining than any backstory or injury report.