MASSIVE NERD ALERT! YOU'VE BEEN WARNED!

What I'm saying is that IF kids picked the ambidextrous kit, they wouldn't pick the kit because their brains are aligned 50/50 (because they aren't) but because their bodies are aligned 50/50 in space making it more difficult to execute certain physical motions - I.e. crossing the hands over top of one another. Though, in fact, that actually isn't a huge problem in and of itself - it's just that in the physical confines of a drumset and with bouncing levers (sticks) flying around, things get in the way of each other. Simply crossing your arms and flapping your wrists is no different than flapping them uncrossed.
No worries. No offense. I love this stuff.
I understand where I have gone wrong. The brain simply reacts to the bodies sensory input. So it's the bodies natural alignment I should be speaking of rather than the brain.