My wife and I just returned from U.S./IOA, and can confirm that despite very heavy crowds (heavier that you will see at Easter, by far), with our hotel cards the waits were very reasonable. The longest, a couple times at mid-day on Spiderman or MIB, was about 15 minutes. Often the Express Line was five minutes or less (Hulk, Deuling Dragons, Cat in the Hat, etc., even at peak times). We waited until near the end of the evening our first day to try the Mummy, and had no wait whatsoever - we rode it three times in under a half hour, and that includes popping into Finnegan's to grab a quick beer.
No, it isn't the good ol' days, back in 2001 when the only express was for resort guests, and it was so new a system wasn't really in place, so most ride ops just sort of looked at your keys, and sent you in the back way, a true Front-of-the-Line program. But it still is the best perk out there, at any park I've been to, by a wide margin ...