At the start of a tourney, you really do need to raise a decent amount with aces. Not only do people often play loose/take big risks to double up, but ideally you would liek to be called by other group 0 and 1 hands only. You are so far ahead of AK, AQ, KK, it's not funny, which is why you want them to call you. JT or 67s, or even more specualtive hands, you want to avoid like the plague.