I've been hit by an Airbus 330's wake turbulence in a Q400 before and have had 4 uncommanded rolls from straight and level to 45° angle of bank. Had we already been in a turn then it would have been even more interesting than it was.
A lesson for all you PPL & upwards light aircraft drivers out there: Make no mistake, wake turbulence is not something to be messed with when ATC give you "recommended spacing", because it WILL kill you, that you can be sure of.
Safe flying.
