Airport Anecdote time.
Took me the same time from curb to thru security at MCI (checking bags....16 minutes total) as it did to do the same thing on a Monday morning at ORD through American...and most of my time in ORD was spent with a gate agent straightening out bag tickets from a missed connection. It took me 1 minute longer than kci to go from curb, check bags, to thru security (including immigration/customs) in Montreal.
It took me 3 minutes more to get off the plane in Toronto to ground transportation (including clearing immigration and customs) as it did for me to get off the plane and be at the curb at kci....that's not to mention the 15 minutes it took me to get from curb to my car.
Convenience. Lol.