Controls mostly, yeah. I think the netcode is bad, but I would expect that to be the same in both. Control problem is a total dealbreaker, though. It's too basic of a problem. I'm cool with advanced stuff being harder on it (like FADC > Ultra in SF4), but blocking is so big in this game that fighting with it isn't enjoyable. If it's an inherent game issue, and is the same on the PS3, then SFxT just probably won't be for me.
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"When I was a young man, I had liberty, but I did not see it. I had time, but I did not know it."