Do you mean, "is ME faster at night than during the day?"
or.."is ME faster than renting a car?" ... or "is ME faster than taking a car service?"
We took ME last Nov. arriving after midnight.
We picked up the bags ourselves off the baggage carousel.
Walked to ME desk.
Only a handful of people in front of us, so waited maybe a couple of minutes. Very quick, friendly, efficient service, especially considering we did not receive our vouchers on time; but no problem, we were in the system.
Waited maybe 10min for the bus, 4 or 5 famlies on our specific bus. I think the bus made 2 stops before ours.
So yeah, I think it might have been faster at night because the line at ME wasn't long, less people getting on the bus meant less time loading people and luggage and unloading at resorts.
During the day, there would be more CM's working and buses running, so timewise, it might be the same.
We could have just been lucky with the fast service that night.