I went two weeks ago, and it wasn't that crowded. Jurassic Park was mid-range in terms of lines becuase the "Really Wet" version of the ride was in use. Mummy was OK and the Simpsons was 45 minutes. A pretty average day...
I went to Universal last Friday, and the longest wait was for The Simpsons at 40 minutes. We got there after 1pm and the tram was only a 5 minute wait. Mummy was only 10. Although we did not ride, Jurassic Park had a decent line, so it was probably about 30 minutes, since it was warm. So the crowds are not that bad there. At least for last Friday..
Just got back from USH, and the lines were no longer than 50 minutes.
Jurassic Park was the longest wait, and strangely enough, the T-Rex looks really beat up... you could see the top of the T-Rex as soon as you turn the corner as there wasn't much of a waterfall obscuring it. To top things off, the top of its (possibly latex?) head is ripped.