Wait Harry Potter still doesn't use the express pass?
Nope, and if RockIt is any indication, don't expect it for a few more years.
As for Minion Mayhem, I got to ride it today and it was an absolute blast from getting in line to getting off the ride. The queue TV display is cute, although you start to catch on that the answer to every trivia question is C (and the most ridiculous answer). The two pre show rooms are very well executed, as are the videos. I know its standard, but I had to chuckle at the plastic oval covering the Sharp logo on the gigantic display in the first pre-show room where you get your glasses and are assigned a row.
Anyway, the pre-shows are funny and cute (seriously, if you can't laugh at the Minions and general humor of the movie, and thus the ride, you're cold), and the ride was surprisingly much more entertaining than Jimmy Neutron was. The exit is pretty fun as well, and they evidently staff it with Minions during the day and people will actually stay and dance with them as they come off the ride. If they would have had Boogie Robots I would have stayed, but I was ready to get out of the park.
Final verdict: Very, very solid C or D attraction, and you really should give it a shot the next time you visit the park. It is fun, funny, and who doesn't love the Minions!?