I have seen politicians ( Olivia Chow, Jack Layton) and former Prime Minisiters ( Kim Campbell) in the back with no special attention at all.
I have been a seatmate to a sitting Ontario premier ( Mike Harris), no special treatment.
The only VIP I have flown with was Michael Sabia ( ex-BCE, current head of Caisse de Depot),
He got the concierge treatment on and off the plane.