I think calling preflop with AKs is the worst. I think you need a read to know that a opp is squeezing here, and then I would probably 4-bet preflop (also to force suntzu out and get HU) - but honestly I dont play in such aggro games yet, so I dont know the correct answer tbh.

Turn fold is obviously fine because:
- you have suntzu yet to act, and he might very well have 2pair+ here.
- a lot of TAGs squeeze with suiced connectors and this flop+turn is hitting a lot of those hand really hard.