As annoying as it is i have had this disc since launch so im asking is it lag or has my disc just died.
Borrow Uncharted 3 from a friend see if the problem happens again.
As Hielke already said it's probably your disk and thats also why I asked if you emblem flag is moving. If the flag is moving I guarantee you that your match will not start. Also if you're screen is black and you can't see the characters before the match starts it's the same problem.
Should i delete game data.. Will that not reset my stats will i have to download all DLC again?