Breastfeeding over-rated?

"The Case Against Breastfeeding" from The Atlantic is a lot of food for thought (har!). I do think that the pros of breastfeeding have been overstated, especially by interest groups like La Leche League, and though the research I've read about childhood obesity and breastfeeding has all sounded pretty conclusive, it is hard to create a perfect study when you're using real-life human infants as subjects. In America, formula-feeding, poverty and education are all so closely correlated, it's nearly impossible to isolate the effects of each.