This is a scan from Wizard How To Draw: Character Creation, from the chapter Super Women
WTF? That woman on the left looks freakishly disproportionate, not attractive, not even if you like larger breasts. And that thing with the ashamed body language of the normal woman left me speechless. To be fair to the book as a whole a few chapters onward in another section on female archetypes titled appropriately "Vixens" (sic!) the same approach to drawing breasts is actually mocked, so strangely enough the example "vixen" drawings have thus smaller breasts than usual for superhero comics. Go figure. Anyway, so it's not consistently advocating freakish balloon boobs.
However that in the archetype section the chapters are Super Men, Super Women, Acrobats, Costumed Vigilantes, Brutes, Vixens, Armored Villains and Sidekicks, and the only chapter with examples from both genders is the one about acrobats (by Adrian Alphona, who draws Runaways), is quite telling. I mean, talking about archetypes I kind of get why they wouldn't think of women as typical examples for brutes or even armored villains, but no sidekicks and costumed vigilantes either? *grumble*