I guess if The Simpsons are a sufficient source for a claim, then this should be as well...
The purse girl hits everything on my checklist: creamy skin, straight teeth, curly hair, amazing breasts. Not for me... for my children. The Schrutes produce very thirsty babies. - Dwight Schrute (From the episode "Hot Girl" of The Office)
The implication here is that Dwight (and possibly other human men) can judge the quantity of milk produced by a human woman by the appearance of her breasts while clothed. While Mr. Shrute seems to be only concerned by the quantity of milk produced, I'm also interested in quality of milk--if such a thing can be measured.
Is it true that the quantity and/or quality of breast milk produced by a human female is in any way correlated to the natural appearance of her breasts? (And specifically, while fully clothed.)