Well, I was saying about the synched one, of course ^_^''; it goes very high at vertical distance. And yes it does reach R.O.B's entire recovery plus a jump, because I've tested this on a custom stage, seeing which is higher, so the ICs had almost the same height as R.O.B's recovery + a jump. I also think that it's the same height as Luigi's recovery trick.
And for the separation part: After the move, you can see them separated vertically right? If they're separated entirely, that probably means you saw that Squall was high at vertical distance, then... if they're not separated entirely, that must mean Squall wasn't high enough. And obviously a desynched Squall can't go that high, although it has some good horizontal distance; because I never said anything about desynched Squall. X.x
I just think there was a rhythm beating inside Squall, because I hear it, and maybe.. IDK. Probably match the rhythm, or just mash B lightly, if I mash B hard enough it won't go that high. X.x