Me and some friends played for a couple hours on Tuesday night. It's a fun game. The handling is a little loose and the game world feels a bit sparse, but it's always fun to race friends and hear one of them yelling at me for constantly making them spin out so that I can ensure my own victory.
In those two hours we only played two races that actually had us working together; everything else had us racing against each other. I was under the impression that The Crew was mostly focused around teams competing directly against other teams, but I didn't even see any indication that this was even a thing we could do.