I get called one...but thats only coz ive got 4 children....i would call my friends of one and two children a supermum too. I dont see how the number of kids you have makes you more of a super mum....
One of my girlfriends has 2 children...and i think she is wayyyyyyyyy super than me. She is the perfect mum - she gets invovled with the childrens activites, takes an interest in their interests, plays with them etc etc...i have another girlfriend , with one child, and DH away Sun - Fri - so she has a very active 14mth old all week to look after. No family around her. I call that super.....