It's interesting that a lot of people see the weirdness getting out of the dungeon and into the cities as a big marker of wahoo, because I don't see it that way at all. A particularly noticeable feature of superhero is that the real world is still there, much as it is in our world, co-existing along side all the weirdness. I know it makes no sense from a verisimilitude perspective, but I think it serves a useful purpose, that of contrast. If everything is weird, then nothing is. You need the 21st century world of iPods, happy slapping and cashback to juxtapose with the guys running at Mach 100 and lifting aircraft carriers.
I think we're mixing concepts. I agree with you that "if everything is weird, then nothing is", and I agree with what I read between the lines which is that you feel "if everything is weird, it's kinda lame". The difference is that I think wahoo is what I don't like, so I push the definition of it towards saying "everything is weird world" is wahoo; whereas you think wahoo is what you do like, so you push the definition towards saying "everything is weird world" has nothing to do with wahoo.
For me the main markers of wahoo are quantity and variety of strangeness. So if there's like 10 different monsters in a setting that's Tolkienesque. If there's 300, as there are in default D&D, then that's wahoo.
Again, we agree on default D&D has lots of monsters, but not on whether it's wahoo or not. I say it's not.