if the impacts of not BF are to be seen, we should be seeing them now. i have DH's child health book and he was on watered down condensed milk. whatever replacement it was, it wasn't breast milk. yup, 45 years ago, it was normal to wean onto replacements at a very young age if they were BF at all

Yes, as a society, we are facing a problem with obesity, diabetes, heart disease, but i defy ANYONE to say that this is solely attributed to formula feeding. there is no way, unless you get identical twins and lock them away for their entire lives, one FF for the first 2 years, one BF, that you can say that FF is THE factor that leads to health problems in life. the behaviours of society as a whole (our reliance on fast/convenience food) are contributing far more than the mode of feeding our children at birth! i would be able to pick apart any "evidence" that was handed over in regard to breast vs formula because, lets face it, there are just no controls and too many outside factors that could contribute to the outcomes they reach
from most of my grandparents generation, that i have spoken too - so lets not get semantic, none of them breastfed, most of them gave thier kids condensed milk or lactose powder. all of my aunts and uncles, and parents, were fed formula, and 40+ years on, they are all healthy middle aged adults. the same with my partners side. there are a million different lifestyle factors that can make someone sick throughout their lives, i hardly think we can blame it on being formula fed.