I could see if he had a great off season/pre season. But he was hurt and missed game one but yet people are crowning him already. Some even had him over AK and trading him away.
Mainly because of where he was drafted, and the interview he gave saying that he's looking to take the starting job. It's typical to take all of that and run with it.
You have to go off of what you see. Other than that catch that he had in preseason, I haven't seen anything else that jumps out at you about Miller.
With AK, you was able to tell pretty quick that he was going to be a good player.