I'm pulling for him. I disagree with the OP, I think Jeremy Lin's 18 pts, 8 assists, and 4 boards as a starting PG is above average among NBA starting PG's.
I do have a hard time thinking he'll be able to sustain that production over the course of an entire season, especially without many other proven shot creators on Houston's roster. They're going to be relying heavily on Lin at times, especially if Martin goes down, and while there is a ton of potential on Houston's roster, I'd be surprised if Lin was shooting over 44% next season from the field.
Then, you look at Darren Collison, a guy who average 18 and 9 as a rookie, shooting much better. Ty Lawson, a guy who after the All-Star break averaged 17 and 7, and shot 50% from the field. Those guys are likely his peers, while guys like Paul, Parker, Westbrook are all head and shoulders above.
Like I said, I'm pulling for him, but I don't think an All-Star birth is in the cards.