Guess basicaly what it boils down to is the fact that your taking a torni fav list vs an army that doesnt often appear in torni's for a reasion. Simple fact is it doesnt matter if he's kicked your arse repeatedly in every game youve ever played, this is 40k nothing really ever goes to plan.

An also if hes that good perhaps its something your doing thats wrong? Bad movement, bad deployment, bad unit choice comes to mind.