All wood effects are pretty damn close to voodoo once you pump humbuckers through a high-gain marshall. And in most blind listening tests, it's tough to pick out the differences between guitars. Thing is, it's about the player, not the listener, and different guitars respond differently and feel different, and yes, some of it is psychological.
My personal (unscientific, untested) opinion is that strings, scale length, pickups, body construction (chambered/solid), neck wood, body wood, body shape affect tone, roughly in that order, most of the time. In other words: neck wood's certainly an important factor to take into account, but not as important as solid construction (good joinery, good fretwork, CF bars/no CF bars, good quality hardware and mounting).
And we're ignoring the other half of the instrument here, ie the amplifier, without which an electric guitar is just a plank of wood with some strings on.