I think our differing memories have to do with geography. I am older than you and am speaking of my experiences as a parent along with others of my generation. But I’m also speaking of the middle of the country, where the trend may have been later than what you saw on the west coast. Most mothers here were still using bottles in the early 70s.
Definately lower middle income here. No, wait . . . make that lower income, no middle about it. Which was one draw of breastfeeding. Mom gets to eat well and basically feed the kid for free.
As for Stanley breastfeeding Obama, its a slam dunk, the video of her friend states she was breastfeeding him, and as you know, breastfeeding babies tend to poop more frequently and the stool is very loose (mustard..LOL)
I have to ammend my income to just over the railroad tracks as well...LOL