I have an old Samsonite F'lite (2 wheeler) that I've been told is slightly over 62" -- I must have checked it 30 times the past 12 years so (NW and DL) and never had it measured (for size, always weighed).

I think until the come up with a laser scanner that does instantaneous measurement most (non VLCC) airlines aren't going to bother with regularly shaped suitcases because of the time involved -- not just the time to measure but the time spent arguing with the passenger. Something that is clearly oversized -- or somebody who gives the agent attitude -- then the chances go up.

Normally I'm carry one only but once or twice a year a travel with my trusty Bike Friday -- no way to carry that on