http://smashboards.com/posts/2987122double post because I have a question of my own
I've read in a few places that using aerials with puff increases her recovery as well as allowing her to shift her momentum more quickly when rising from her jumps. I'm curious to know how much of this is actually true or just imagined. I'm inclined to believe it's bull**** but I don't want to discount potentially useful information without properly researching it. I can't test it myself, though, so if somebody who can would be able to check on it I'd appreciate.
Tl;dr: Yes, aerials increase horizontal recovery for Jigglypuff and Kirby.