I don't get anything like that but on occasion my game will spike during online play for a half of second ( PS3 Version ) and I never understood why, if I'm drifting, it'll cancel it, if I'm turning same thing, it slows me down for a second whatever. It gets annoying.
Your game shouldn't be freezing. I have played online many times and the game has not even froze once. The important thing about this game is that you should never immediately go straight into an online race after you boot the game up. Instead, you should go to Single Race and play an offline race once. This is to allow the game to cache all its data. Once your done with that, then you can go online without any freezing.
Driving a PC racer with the keyboard is about as effective as typing an e-mail with your car's steering wheel. ~ Brian Ekberg