I don't think the average U2 fan is even 5% as critical as the average poster on this forum. For every one of you who says something like "ATYCLB" sucks bone!", there are about 15 casual U2 fans who say, "I like that album with 'It's a Beautiful Day' on it! Oh, do they have a new album out?"
You can argue all you want about how the critical U2 fan's opinion is worth than Jane Doe who works at the dentist's office, but the band themselves clearly don't see it that way. U2 has always pursued the biggest audience possible, and has shown remarkable ability to win over (at least two) new generations of fans, largely with the help of (a) radio singles, and (b) their incredible live shows. I therefore maintain that far more U2 fans like the last two albums than the current one, although I concede it's a bit too early to write the epitaph of NLOTH just yet.
There simply are very few bands with the cross-demographic appeal of U2. The majority of people on this forum present, in my opinion, a very narrow window into U2-fandom. The majority of posters here tend to be (a) internet babies -- i.e., third-generation U2 fans that were introduced to the band in the 1990s; (b) highly critical, obsessive types (I might include myself in that); (c) fans who are uncomfortable with U2's appealing to a uncritical, mass audience (hence people over-rate obscure tracks like "Winter" as the direction the band should take); and, (d) English-speaking.
This is all fine and dandy -- to each his own and all -- but I just make the point that this particular demographic is not representative, in any way, of U2's overall fanbase.