MirriVan - It is also why I try and alert parents to things that damage their kids - comparing them negatively to others is a biggy. End the suffering
Jinkies! Just about every parent on here has had moments where they compare their child to another - sometimes it is fuelled by a competitive element, often it is fuelled by unnecessary but totally natural worry and sometimes there is genuine concern about development.
I remember when ds was 8 months old, I took him to enrol on a baby massage course and the lady said, 'oh he will be too mobile by then, this course is for much younger babies' - ds was my 3rd child, maybe I should have known better, but it wasn't until I was in that room full of wriggly, alert, but still immobile tiny babies and saw, and compared ds - double their size, lying immobile, staring intently at only me....did it completely hit me that all those niggling worries and doubts I'd had since he was born, was because there was something actually wrong.
Comparing children is how the data exists as to what constitutes 'typical development', and gives us those windows of time where we can say, 'ok it's not time to worry'.
But it is also perfectly normal and human to look around at the other babies in the baby room or children at school and be aware of and sometimes worry that your child is not doing something the others are, sometimes that is not useful, but sometimes it is, because it means we see our child needs a bit of extra support.