My longest wait ever for a bus was 45 minutes for a bus to Downtown Disney from Port Orleans Riverside. Of course, it was Halloween and I was dressed as the Statue of Liberty, so as all the theme park buses pulled up and the passengers disembarked, they'd walk past me and stare (they never heard of Halloween?) and at least one person would say "Aren't you supposed to be standing up?"
Had three 30 minute waits for buses to or from AKL on the last 4th of July weekend.
And I'll never understand why they've got 5 deluxe resorts (all the Epcot resorts) sharing buses.