Since we go to Disney every year, sometimes twice, we have experienced different crowd levels and wait times. I have found we wait less in line in the March-Apirl months and much longer waits in July. We go more often in July.
I thought we were crazy to wait 75 minutes for Soarin' last year...but geez, looks like some have us beat with 2 hours+! I can't remember if we waited over an hour and a half for Rock 'n' Roller coaster when it first opened or not...or if we ditched the idea.
Let me tell you though, that 75 minutes felt like an eternity at midnight during an EMH (that means NO fastpass). The line moved like a herd of turtles racing through peanut butter...