Mo- I 'think' Lu was about 6.5kg at 5 months...... whatever she was it was just under average. She did have an above average head circumferance! We called her boof head for a while.

I don't think people who make random comments do it to be mean or judgemental, i think often they are just making conversation.
I get everything from "She's big" to "she's tiny" i just smile and nod. Whatever! She is happy and healthy. I know i am doing the best i can, and i am feeding my daughter well so i don't really listen to anyone's comments.
Water off a ducks back and all that....
Like you say Kim, all babies are different. Throw your blue book out i say! Causes more trouble than it is worth sometimes.