Wow! I don't know, maybe I ran into a more difficult lobby, but I surely didn't get any winstreak, maybe won like 60% of the matches at best. The competition seems hard enough. What is your PSN user ID?
Haha, of course, not every lobby is the right place for getting big winstreaks^^. Even if I think the skill level is a bit lower in general, it might be that this sounds weird for you, but you know, since I got it rarely on xbl, a win streak about 5 or more is already a lot for me xD
Got no big one too yesterday, though.
It takes some time to get accustomed to. Maybe 1-2 weeks I'd say. It's more precise because of the bigger ranges of motion of the joystick, and bigger buttons, BUT, doing inputs can be slightly slower. I like it though, it's much more comfortable playing with a 6 kg controller than a tiny regular controller!