Alexander said:
But think about Henson's real game experience. Take the Baltimore game. We all can see now that his success there was due in large part to the loose coverages the Ravens were in. Once Chicago had time to prepare for him, they confused the daylights out of him.
Say Romo was played in these trash games. Would we know more about him?
Sometimes we are more curious for ourselves than anything else. NFL coaches can and do gather what they need from practices. How else would they know a QB like for example, Carson Palmer was ready to start? He had very little meaningful gameplay his first year. Same for Culpepper.
Maybe you ought to watch the game again, because I doubt Henson fumbled on his first snap because they were on loose coverage.
They were blitzing pretty well. But I think Chicago had game film on Henson and were prepared to play him, rather than Baltimore, who were really prepared to play only Vinny.
As far as second statement, I am sure Saints saw plenty of Jake Delhomme in practice and even in couple games, yet they, in their all their wisdom thought, Aaron Brooks was the better QB. So much for knowing by watching practices.
Both the guys you mention, are first rounders, with lot of money invested and they are usually pushed to play, much like J.P. Losman even if they suck in or not the best in Practice or Akili Smith etc.. In fact, there were many reports that Palmer wasn't the best player in practice and Kitna was when they decided to start him. Same with every year we keep hearing how Byron Leftwitch is outperformed in Practice by his backup, yet Leftwitch is the guy starting and might also add, indeed is the better QB.
So your argument is not really valid about practices always proving that a player can play. Heck, we all know Ben wasn't so hot in Pittsburgh when he started with obvious statements from players.
Not that I am totally disagreeing with you, but examples you gave are not good ones though.