I'm chiming in a little late, had a busy weekend...
Anyhow, I TiVoed the game and have watched most of it. Overall it was dissapointing as a Henson fan. With the amount of running plays, there was no doubt intention not to do a lot of passing this game. Some plays I thought he looked uncomfortable/unnatural, but then others I felt he looked comfortable. It was hard to get a read, and there's no way he could have gotten into a passing rhythm with the little they passed. But he does look anxious when he does get to pass. Like he wants so bad to make a big play, as opposed to letting things come to him and taking advantage of what the defense gives him. Though you can't expect their offense to be in sync at this stage yet.
I think it's premature to make any decisiions on the 1st game...it's about how he progresses up until the last game. When if he improves a little in each game? This is his chance.
I've always been about the QB position and bringing in young guys, even when you have someone already, as it takes a lot of tries before you find good ones. So, I'm not giving up on Henson (or Romo) yet, but I'm for drafting a guy like Whitehurst in round 3 or 4 (if we can get a 4th). Though I think someone takes him in the late 3rd round.