Loading times reduced? Mmm, I don't think so. It does it matter? If you install the game loading times are pretty fast.
For input delay, i think it dependes on how bad or good is your connection with your rival. As I say before, for now i don't see any improvement on speed or quality of netcode. I tried with two friends of mine who I play often, since they are from my country. 2 and 3 bars, and the matches were good as always, not perfect but playable. I didn't notice improvement with them. But having the chance to play ranked match only with 2 and 3 bars people has no price for me.
I have been told that if you try to enter into a room were it says "2 or up" in player match and you have 1 bar, you can't.