First, regarding Hebert, he has been a special teams standout for the past 2 seasons for the Bengals. I know he lead the team in ST tackles in '08 and was the ST captain last year. He will be on an NFL roster this year although it might not be the Bengals. All that said, he is really bad at safety.
As for Tebow, I was at the game last night about 20 rows up from the visitors bench and wasn't really impressed or unimpressed by his performance. That wind up from the hip is definitely still there, and it isn't just under pressure. He threw the same way in warmups and when tossing on the sideline before coming into the game. Maybe Denver doesn't want him messing with it while he learns the offense, or maybe they just don't want him to change his mechanics so he is comfortable, I don't know. That will be a major liability for him until that gets fixed though, he is asking to be stripped and is giving a little extra time for DBs to react. He did throw the ball pretty well when given time, but threw a couple of his patented ducks as well.
On a side note, there were a TON of Tebow jerseys, both Bronco and Gator, in the crowd and I saw at least 3 guys with their heads shaved friar-tuck style. And yes, they were all as unbearable as you would imagine.