yup my SIL had b/g twins 7 weeks before we had our b/g twins
so IL's went from 0 grandchildren to 4 grandkids in 7 weeks!
its just a natural thing that they get compared esp weight/size stats when they were little which was pointless as my twins were 10 weeks early and born just over the 1kg lol
took them a bit to catch up lol
i just would take it with a grain of salt

kids will always be compared against their peers. Some people just get their rocks off and think its an indication on how we measure up as parents
crazy hey. This parenting gig is hard enough as it is, without having our own family etc knocking us