The stock tune for the new STIs isn't just bad on a dyno graph, it is a palpable, tangible, in your face kind of thing. You put your foot down on the gas and nothing happens. This is 305 HP? A Stock 2005 STi is much more responsive even with the downwardly revised hp rating for the new standards (285-ish).
Subaru effectively hobbled it to pass emissions with the eight year old motor.