Gene Hackman scrutinizing bowls with naked boys "playing leapfrog" is well worth the wait. The movie has fun with stereotypes and celebrates them, and makes sex jokes galore without descending into smutty (the most risque it gets is Robin Williams hiding a statue's privates, and Val grimacing at the houseman's thong).
I only have two real complaints: 1) Val is...kinda unlikable. He makes a pretty tall order asking his parents to literally hide their identities, and acts wounded when they don't immediately capitulate. I for one was happy when he disappeared to check something and left Nathan Lane alone to chew up scenery. And 2) Calista Flockhart is a very lovely woman. But it's insane they tried to pass her off as 18 (or Dan Futterman as 20), Why not modify the script to fit their ages?
(And I guess one more tiny complaint: Christine Baranski is criminally underused. She is a dynamite actress and barely appears in the film)
But those are minor complaints. This is absolutely Nathan Lane's show and he kills every scene he's in.