Yes, there were long songs that made it on to albums, but what Bono was talking about were the straight ahead "silly" love songs that you do hear so often on the radio, which have nothing to distinguish them except their high sugar content. These are the kind he apparently chooses to keep private. I would not place the three songs you mentioned in that category. Just look at the lyrics for all of them. They're adult, complex, even a bit dark. I think Promenade is the most direct, least dark love song they have released, but even it has a hint of melancholy about it. Promendade, by the way, almost didn't make it onto the album, as Bono initially deemed it "too personal". He had to be persuaded that it be included. I guess the mention of the spiral staircase was a bit too close to home, if you'll excuse the terrible pun. (Bono and Ali's home at the time had a spiral staircase that led directly into their bedroom--the "higher ground" in more ways than one.)