It's kind of funny how adamant people are about this NOT being U2. Don't get me wrong, it's also amusing that some people are convinced its them.
Whether it is or it isn't, the fact that people are asking, "Where are the vocals!?" "WHAT/ WHY would they be rehearsing?!" etc. in regards to it NOT being U2, are being ridiculous. Why WOULDN'T the band be rehearsing? When you're a band, you rehearse all the time. Before you go into the studio, before you go on the road, before you meet with a producer, when you're coming up with ideas, just for fun. And the vocals being absent don't indicate anything, as this recording could have been made two months ago (or yesterday), while Bono was out saving Neptune.
My point is, is that there are a few people (well, maybe just a person... or two) in here who are SO SURE that this isn't U2 that they're jumping at everyone else's throats who think it MIGHT be. And this is far too common in this section of Interference. Yea, the sound quality sucks, and the music isn't what you want U2 to produce, but lighten up. It's childish and tacky to be so assertive about something that is so far beyond anyone's realm of knowledge at this point.