Well, a pretzel is a pretzel, doesn't matter what your doing it on. So does this thread suggest that the terms Rodeo, Misty, cork, fakie, Switch, Mute, Japan, Tail nose etc. should all be null and void too? Plain and simple, if it weren't for snowboarding skiing would still be gay!
As for the term cab, it is derived from a switch frontside rotation, frontside called that because the first part of you body to clear the plain of the jump in the rotation is your chest "Front" thus meaning that all switch spins on skis are frontside or "Cab". Just like all forward spins are technically Backside (Back being the first part of your body that clears the plain of the jump when initiating the spin ex: "backside 270 off a rail")either way cab sounds better than fakie and people get tired of saying switch.
We could all be like mosely and just name things after food products but that would be kind of silly now wouldn't it!