Well me personally I've had 3 c-sections and very different breastfeeding experienced with all 3 even though all 3 births were fairly similar. My milk did take slightly longer to come in with my emergency than my scheduled but only by 24hrs and I think that was more lack of knowledge about breastfeeding than the birth itself. I suppose I don't have a natural birth to compare too but I don't believe my c-sections affected my ability to breastfeed. My early issues had more to do with oversupply, engorgement, thrush and mastitis. Nothing to do with my birth. My milk only took 4 days to come in with my emergency c-section and 3 days with my scheduled ones.