There's 5 years between my two. I don't know about the actual labour as I was a VBAC, but as for carrying and breastfeeding/recovery afterwards my body certainly remembered. I was showing at 8 weeks. Even when people have babies close together each labour is different, I'm wondering how someone would know that it was like a first birth just because there was a larger age gap - what are they comparing that with? It could just be how that person gives birth