Are you asking if there might be additional delays for picking up a vehicle with automatic transmission vs. one with manual transmission? Don't think there'd be any.

However, if you're asking about the efficiency of picking up an Avis vehicle at CDG T2 in general, that's hard to judge. You'll have to go to the car rental pickup desks on the lower level between T2A/C & B/D, and then wait in line, if there is one. They might have elite level check-in area, but I'm not sure. Generally, in my experience, it doesn't take too long, but YMMV.