agreed- backflip is much easier to stick than a front flip. usually on a backflip your board is pointed at the sky as you leave the lip, and you stop the rotation when pointed back at the ground. it's not even a complete rotation. plus the fact that you are staring right at the landing for the last half of it.
i still say that running and flipping off a diving board is more applicable to snowboarding than a trapoline is. the airbag would be sweet, but i've never even heard of one out here in bc.