THe longest line I ever waited in was way before fastpass and right when the Indiana Jones ride opened in DLR. I waited for almost 4 hours to ride that ride! I can't believe we spent almost half of our day in line!!
We waited 2 1/2 hours once for the Rocket Rods at Disneyland. I'd never wait that long again, though I'm glad we did since the Rocket Rods became extinct a few months later.
Longest line ever at WDW was 30 minutes for splash.
I guess I've never really timed them.....but it sure seems the LONGEST WAIT is for the restroom!!!!!