Is that not traction control on the ST. Bogging down is when you're not using enough revs and the grip causes the revs to drop on the start line.
pretty sure its not the tc coz the revs are still up there but turbo's not kicking on full chat and neds time to get back up.
was driving my friends evo 5 and got the same problem while i was on the gas at about 50mph, hit a massive pot hole and killed the power, boost dropped of completely for a few secs.