I like the question about why Bob calls his ex-wife "Gale" rather than Wendy.
Bob definitely prefers to call supers by their "normal" name. Like Tom said, it's a bit of a "power" thing, since most supers try to keep their identities a secret.
To me, Bob calling her Gale indicated that Bob feels more submissive towards Gale - something closer to powerless. It's also a matter of distance: Wendy was his wife, Gale is just another super.
The one thing that bugged me a little and didn't quite sit right - and to be fair, I never mentioned this to Tom because I didn't think of it before the book was published - was that Medico refers to her as Wendy at one point, instead of Gale. That just didn't seem quite right to me. Medico is basically callous towards "tippys". He's really only interested in supers and he responds to his own "super" name more than his "normal" name. So that bit of dialogue seemed reversed. In that moment, I would have expected Bob to call her Wendy - Bob was sort of re-living that moment and back then, he surely would have called her Wendy, not Gale. In turn, I would have expected Medico to not recognize the name Wendy until he connected it with the "super" name, Gale.
Anywho, that's how I interpreted things

Wendy is Bob's wife. So when he feels close to her or remembers her, he calls her Wendy, but when he feels distant, he calls her Gale.