It wasn't always so. A decade ago, U2 couldn't be bothered with the Grammys, or any other kind of promotional event that smacked of salesmanship. In 1993, U2 turned down an offer to perform at the Grammys, and the Edge and Bono didn't even bother to show up for the ceremony when "Achtung Baby" was nominated for album of the year (eventually losing out to Eric Clapton's "Unplugged").
Most likely due to other commitments, mr Kot. But the rhythm section was there.
The U2's get to their hotel and get about their business, representing the band at the Grammy Awards where Achtung Baby is nominated in several categories, including Album of the Year.
As soon as they get to the Grammys Adam and Larry regret coming.
And they all attended when JT or Zooropa won. It's a little hard to take a rock journalist that can't get his facts straight two paragraphs in seriously.