Even with Jumbo fretwire, look at your fingers when you play up the neck (especially bending). Are your fingers touching the fretboard? Yes (I bet they are)? Well, scalloping your fretboard may help you in putting less pressure on the strings. Basically, whenever your fingers touch the fretboard, it is wasted energy. I don't scallop my fretboards, and I think it is probably a waste of valuable neck tone, but it will prove easier (though it may take a while to learn the technique) to bend notes, because you won't have to bother with your fingers fighting against the fretboard.