He always is, I can't recall one season where people haven't said this. Even before Smart but certainly louder after. It was said that he is the 6th pick, he will start next to RR and AB will be 6th man, then it was Young will be ready to take his spot after half a season his 2nd season (some were clamoring during the first), RHJ before his first game and Rosier after SL (the first one)! Many said he wouldn't get paid his last contract and if he did it wouldn't be that high.
Now, AB is my favorite player but I still say, if Ainge decides to trade him I'll be on board because he knows what he is doing and he absolutely knows more than I do. I wouldn't be shocked either way trade or keep/extend, I'm just pointing out that I have heard this song and dance before.