First hand of an SnG - Dealt AA

[scotty34]

I also posted this in Poker Theory, but I would like to hear responses from people who play mostly SnG's.

Say you are playing an SnG tourney, relatively low buy-in. First hand you are dealt AA. Do you think it would be a +EV move to push all-in right away? My reasoning is that in many cases, I would not be surprised to get a call, or maybe even more than one. People that have no reads on you may just think you are being an idiot, and call with holdings such as 88-KK, AK, KQ or even some worse hands. Doubling up off the first hand would always be nice.

What do you think of this play? Also, would your response be different for different situation, such as being on the button with a lot of limpers, or being UTG? I was referring to around $10+1 or so, but, how effective might this be in the higher buy-ins?