AK 3bet - standard fold?

[Go_BroKe]

Full Tilt Poker - No Limit Hold'em Cash Game - $0.10/$0.25 Blinds - 6 Players - (LegoPoker Hand History Converter)

Hero (SB): $25.95
BB: $25.00
UTG: $23.65
MP: $47.95
CO: $29.95
BTN: $27.00

Preflop: Hero is dealt A[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/heart.gif[/img] (6 Players)
3 folds, <font color="red">BTN raises to $1.00</font>, <font color="red">Hero raises to $3.50</font>, BB folds, BTN calls $2.50

Flop: ($7.25) 5[img]/images/graemlins/club.gif[/img] K[img]/images/graemlins/spade.gif[/img] Q[img]/images/graemlins/diamond.gif[/img] (2 Players)
<font color="red">Hero bets $5.00</font>, <font color="red">BTN raises to $17.00</font>, Hero folds
Uncalled bet of $12.00 returned to BTN

Pot Size: $17.25 ($0.85 Rake)

villian was very TAGish like 20/15 or something.
Haven't seen any bad moves from him.