I think it's great that Q sticks to their guns, and calls it the way they see it. You may not have to agree with them, but at least they haven't folded like Rolling Stone has in so many ways.
I've seen Radiohead live, as well as U2. They were two of the best live performances I've ever witnessed. I don't think I could say which one was "better" because they were so very different. I enjoyed the U2 performance more, simply because they are my favourite band (and for all the reasons why they hold that title), but objectively I can understand why Radiohead would be classified as the top act in the world. Same goes for U2.