I think it's pretty offensive-based, with a lot more insane heavy hitters out there. Some of the new Dream World abilities have really mixed it up well, but I find it annoying how Smogon has banned Drizzle+Swift Swim teams. However I still understand why they did it, heh.
I used the Dream World a handful of times with my Japanese White. But I stopped using it before the English games came out, and I haven't used it since.
My staple team is one of mixed weather. I trick the opponent into thinking I have one type, get rid of my counters for the other, and then switch to that. I won a lot of battles like that, but it's now impossible to do with Team Preview.
I hope and expect a few people will return in the coming months, what with X and Y coming out. And no, I have given up on breeding and EV training due to time constraints, and I've switched to PO. How about you?