The question that needs to be asked is: What was the song to you BEFORE you heard the cover? Because if to you it was the guitar solo (like it was to me), he didn't actually cover it. To the non Edge-freaks of the world, the guitar bit that he played was not the full solo at the end, it was the smaller first one.
There are two 'solos' if you will in the song. The first and smaller less passionate one is right after the "almost makes sense..." lyrics. The real solo (and go watch ZooTV as it's much more obvious) is at the end during the "dum dum dum..." outro piece.
The real solo, the passion of the song, is buried slightly in the real version, but it's the centrepiece in Zoo as it should be. And it was this solo that he didn't play - and the part that I most wanted to hear him play. So, quite honestly I have to say... I'm not a fan of this cover, and I'm not going to slobber all over it, because to me, it's kind of like someone covering U2 and not singing the chorus.
The lament, if you will, in this song is truly the guitar solo - the vocal is a build. But that's just how I've always seen it as an Edge fan. The song has always been about his pain at the time to me, so I nearly keeled over when the thing happened in FTSD (without spoiling anyone). It brought home what the song has always meant to me as I've always heard it on a personal level to him.
Jack White put all of his passion into the vocal, and that was really odd to me as he primarily is a guitarist (and a talented one at that). So I'll never really warm to this cover.
However, that being said, this excellent debate we can have about these songs is the reason that I think this cover CD will achieve what it's setting out to do. Can't wait to hear the rest.