Queens but oops I hit an A in a multiway spazzfest

[DBSpecial]

Party Poker 0.15/0.30 Hold'em (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Preflop: Hero is UTG with Q[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/club.gif[/img].
<font color="#CC3333">Hero raises</font>, <font color="#666666">2 folds</font>, MP2 calls, MP3 calls, CO calls, Button calls, <font color="#666666">2 folds</font>.

Flop: (11.46 SB) 3[img]/images/graemlins/club.gif[/img], 6[img]/images/graemlins/spade.gif[/img], 5[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(5 players)</font>
<font color="#CC3333">Hero bets</font>, MP2 calls, MP3 calls, CO calls, Button calls.

Turn: (8.23 BB) A[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(5 players)</font>
Hero ?

After 18(!) hands all four Villains seem loose, two passive and two aggressive. That said, this didn't strike me as a read-dependent situation.

Any chance of me being ahead of 4 villains after the turn? Does the size of the pot make any difference to my decision?