GGPO (yes I responded late but whatevs) was shit on 3S because they just ripped it from the PC and moved it to consoles, even then 3S on 360 is fine, as opposed to PSN (which is a painful experience). There really is no problem with it on Skullgirls at all.
But in the end it's really up to the people making it for PC, so It's kinda pointless really.
On top of that I also agree with everyone else here. I'd support it, but really a console port should be in consideration at leeeaassst.