We have a friend that has a 14 week old baby and she is a lot skinner and can roll over while my 13 week old DS is fatter and can't nbsp;roll over but STTN.nbsp;
I will take sttn every. Single. Time. That's what I compared to the most. Though now I am horrible and compare DD to her peers on talking. She speaks and has the thought process and comprehension of a 3.5 year old and I get annoyed with two year olds who babble or I can't understand. My husband tells me I'm bad and that they are babies.
Oh, she didn't walk until 15 months so I was always comparing her to early walkers. It will drive you mad though. When they say ranges are literally months wide, they mean it. Know that while their kid is doing one skill, yours is just doing a different one that they haven't done yet.