It's a real shame if people think this article shows there is not much difference between the health effects of bf and ff. This is quite wrong. The article focuses a lot on the 'greyer' areas like obesity and IQ, where the research will never be clear-cut, and almost ignores the solid, uncontroversial, established evidence for formula's negative effect on infection risk (not to mention the health impact on mothers - more formula feeding = more breast cancer, for a start).
I agree there may be a price to pay, by mothers, when they bf. But this is because society is not geared up to supporting them with good info, employment flexibilty, acceptance of bf anywhere, skilled help to resolve problems. This 'price' is not inherent to breastfeeding.
It's certain that mothers will get criticism and pressure, whatever feeding they do. There are people who look down on others whatever they do.
But the overwhelming evidence is that the pressure to formula feed is stronger - this may not solely be pressure in the sense of criticism, but pressure in the sense of it becoming difficult to bf. This is why 9 out of 10 mothers who stop bf before 6 weeks wish they could have continued.
Breastfeeding is not just an individual matter. It is an important public health issue, and there is a lot of good evidence that we - taxpayers - would save money if there was more breastfeeding. This is not just an individual woman's responsibility; it's a social responsibilty to make it possible, and easy, for as many women and babies to breastfeed for as long as they wish.
It may be comforting to think there is not much difference between ff and bf - but it's not scientific, and this article plays silly games with the science.