I have a friend, he totally does not play Guilty Gear. He mostly plays Bemani games. He mashes when he plays, but he is some how able to mash out these crazy combos. Some examples:
With Jam,
running 6P(1hit)-f.S-c.S-6HS(1hit, RC), j.S>236K>623K>236K
With Baikan,
running TK.DoSomething(rc), K-D(frc), ad.S-D
With Bridget,
iad.CallBack, P-P, land, StarShip(frc), 6S, j.S-2S, j.S-2S>StarShip
What's up with that? I look at his hands while he's playing, he's truely mashing. Too much IIDX or something. Bemani skill is transferable to fighting games.
I think the damage from Millia's standard ground to air combo is even bigger, and leads to knockdown and a mixup back in to it.