OccamsLightsaber
Regularly boosts GAF member count to cry about 'right wing gaf' - Voter #3923781
Don't the publishers usually handle servers and not the developers? I mean as far as hosting the dedicated servers. Obviously the server-side software is on Evolution but the server infrastructure itself is on Sony and PSN itself being smooth is not necessarily an indication that the Driveclub server infrastructure is sound.
It's possible that Evo underestimated how demanding their game is. It's also possible that its a problem you can't throw servers at.