The more I listen to everything in the "double album" (aside from the acoustic session, can't listen to that again), it seems to me there is one song that sounds like it could have been a traditional U2 type anthem hit in the vein of "Beautiful Day", and that song is/was "Invisible". Had all the ingredients and didn't register a blip on radio in February. Don't see them garnering much airplay from anything else (still failing to see why so many are clamoring for The Crystal Ballroom to be a single).
Its a pretty good album as a whole, but just don't see it as likely to get a ton of play. Of course radio isn't what it once was, and they should do fine selling concert tickets which is the main platform of the business model these days, so in that light I'm sure it'll be a success, but just don't see anything from Songs of Innocence having the lasting effect on public consciousness that so many U2 songs of the past have.