He has improved a lot since his first season but even a lot still since last season. It's definitely true when they say the third year is the key to seeing how good someone can/will be. I'm not saying that he's going to be great...but from what I've seen- he's on his way there.
He is making a lot better decisions and seems to be a little more patient with letting the plays develope. He has shown a lot of confidence in his abilities and the abilities of his fellow teammates. Although he is playing so well right now- he still has some rough edges and some polishing to do before he is a very good consistent QB.
Now we see how special this guy is and what the future may hold for football in Houston.