I agree, this might or might not be the first single.
There's still that Corbjin video... I mean, Corbjin is still a big deal. I can't see them shooting something with him in Spain for "DVD filler" or anything like that. It seems likely that they have had a video, or at least the makings of a video, tucked away for some time now.
Still, I think Get On Your Boots, even if similar to Vertigo in terms of being a riff-driven, fun single, would redefine U2 to some extent. It's been too long since that tongue-in-cheek tone has reared its head; I'm ready for the U2 that's better than the ridiculous rockers at making ridiculous rock music.
On the other hand, I tend to treasure songs like Clip #1 and that chorus is unbelievable even at Beach Clip quality
You know what, give me any of the Beach Clips as Single #1. Any of them. Showstopping single and classic track guaranteed.