I've NEVER slow played AA in my life - and I laugh at people that do - b/c all you are doing is slow playing ONE PAIR. The biggest problem I have with AA is that it's an impossible hand to lay down - even after the flop (typically, if I'm not all in pre-flop with them, I'll most likely be all in on the flop). YES, I have made a lot of money off of them - but from over a million hands I've played - both online and live - I have seen them cracked well above the supposed 80/20 percentage rate they are 1 on 1 - seems a lot closer to 65/35.
I hear that a lot. Yes, it's just "one pair", but the PF
equity of that one pair is massive. You can just go all in every time and it's a safe option, but a net losing one because you're not going to get the callers who pay you a bit more when they pair their K, Q, or think their pocket 10s might be good. Maybe not in microlimits. There might be enough people there who will call you down often enough to net a profit over just playing the hand out. ;-) I hear you about slow playing it. I won't say I never do it, but it's always a calculated risk. Obviously, if you've played a million hands you know all this better than I do (I'd guess I'm pushing 200,000), so I'm saying all this for the sake of conversation, not to educate -you- in particular.
On a million hands you've got to be converging to the average. I don't have hard data (yet), but wouldn't be too shocked if the hands that play with your AA when you go all in on the flop are only ones that have you beat or draws with a ~33% chance to beat you. The real return is definitely influenced by selection bias. 65/35 at showdown doesn't seem implausible.
RF