Or maybe the lower classes just don't fecking talk about it constantly because it's not that damn interesting ??
Hope I wasn't judged for not breastfeeding dd ? Believe me I tried but for whatever reason simply didn't produce any milk, nada. And a bottle is preferable to a starved baby, breastfed ds fine for over a year tho, woooo hoooo, AND I did it in maccy ds, I was an EXTRME feeder 
Fwiw, a girl in my year got pregnant at 13, had the baby at 14 and did in fact breastfeed, was a bloody good mum too, she now works rehabilitating young offenders, like a lot of young mums she did something with her life but dosen't feel the need to shout it from the rooftops !