Yea, would be fine if they pimp the whole PSN a bit.
But your problem seems to be on your side. I had the same problems (disconnections after 0-1min, lagging cars, etc.) & fixed it with the following guide: The ULTIMATE ultimate guide to fixing your NAT
thanks for the guide, not sure if is a problem only related to users though. I find it a bit odd that when I get disconnected from the server, everybody else in the room does as well, obviously isn't only my internet connection causing the problem