I read the recent article about this type of play and being prepared to push most of the time. However, time after time I seen plays like this ending up with the overpair being lost to a set or FH but a fold just seems too conservative even after the raise.

Ultimate Bet No-Limit Hold'em, $.25 BB (10 handed)

Button ($36.50)
SB ($9.35)
Hero ($27.20)
UTG ($9.35)
UTG+1 ($33.65)
UTG+2 ($9.50)
MP1 ($21.25)
MP2 ($23.60)
MP3 ($24.50)
CO ($12.30)

Preflop: Hero is BB with , .
3 folds, MP2 raises to $0.85, 4 folds, Hero raises to $1.65, MP2 calls $0.80.

Flop: ($3.40) , , (3 players)
Hero bets $2.5, MP2 raises to $5

What next???

RAISE. ... to about $12 or so.

He likely has an overpair or even underpair and is testing you to see if you have a big pair or continuing an AK-type hand. There aren't many raising hands that hit this flop unless he raises 88, in which case he would likely let you lead again on the turn rather than raise the flop. But since he might be on a draw having a JTs or KQs type of hand, I'm not slowplaying, either. If he has an overpair like JJ, he's likely to call you down at these stakes.

Bottomline: This is the kind of flop I am willing to lose my stack on with AA because far more often than not, you're against a weaker overpair if he plays back to your re-raise. If he raised with A9 and flopped trips, well I pay him off.