Not sure if they gain weight faster or slower. My daughter was a textbook breast feeder and gained about 250-300g a week. DS2 gained less than that, mostly due to undiagnosed ties. DS2 seems somewhere in the middle. Would be interested to know how big he is now though, I should contact the MCHN for our appointment - lol. We played phone tag a bit and then I gave up, but would be interested now... Just don't want the whole appointment with them though. The MCHNs in our area are renown for how "bad" they are, especially with breastfeeding and "natural parenting" style parents. They are so out of date with their info, and I'm sure have no idea about breastfeeding past the initial stage, some of the advice I got with DD - eek! So glad I was happy to do my own research, and confident in myself, even though I was a first time mum.