It all depends on the situation. Some whips are actually scrubs, a way of getting over a jump without loosing speed. Other times you whip to show off or set you up for a better position on landing.
I ride DH and MX and find I have to let the bike move and flow in the air or it just feels dead- like the bike is controlling me, not the other way round.
It's a weird one but if you are a jumper, you'll understand