1/2 PS LO8 hand - is this hand played properly?

[J.Copperthite]

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You hit almost an ideal flop, yet you feel that you've still got a lot of work to do and don't feel comfortable raising the flop.

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It has nothing to do with comfort - I know the odds are against the nut straight being the nuts by the river when the flop is two-suited. I almost never raise the nut straight on a two-suited board on the flop. I wait for the turn to throw a nice card at me and then I get aggressive. I've found this increases my winrate significantly (haven't had a losing month since March of this year), which is hanging in the 4.5 BB/hr. range.