WITS is absolutely not in 5/4 time. In fact, no U2 is. Outside of Soundgarden, you don't really hear 5/4 on the radio. The theme music from Halloween, oddly enough, is in 5/4 time (some utterly useless trivia for you there!)
Anyway, for whatever its worth, as someone who's played drums for more than 20 years (and the last 5 years have been in a U2 tribute band) here are the U2 songs that are in 6/8:
Streets (intro/outro)
Trip Through Your Wires
Acrobat
Love Is Blindness
Windows In The Skies
And that's it. Everything else is 4/4.