Luigi Player: I've tested it, and I'll add it to the main post and credit you in a bit.
IrArby: I know, there are a decent amount of ATs that are quite useful, though most are character specific. Melee had a lot more universal ATs though like Wavedashing, L-Cancelling, JC Grabs, etc. While Brawl's more useful ATs are things like Diddy's dribble, TL's double arrow, Link's arrow cancel, Snakes DAC. You get the point.
I agree with you on the second part, slow run in itself has very limited potential to be useful. Though it's needed to perform ledge running which I think has SOME potential. X-slow run on the other hand looks like it can be quite tricky. And yea, it really is just an analysis on running, but having "AT" in the title is more attractive xD