I don't bother with the argument, either, although my husband tossed it out at a friend's wife when she asked if I was still nursing our now almost three year old. The sad thing is the mom he said it to has an exclusively bottlefed son, only 2 days older than our daughter, whose speech was way behind hers... I gave my husband a little lecture about hurting feelings after that!! I'm nursing baby #4, and I can't even imagine the nuisance of formula!
Dear Lord, did I read that right. You lasted until your baby was 3? Bless you. Because I know of all the benefits of breastmilk, I've made the commitment to nurse for a year. But, I'm already counting down the months. Well, not everyday. But I do think about it. That could be because I'm an exclusive pumper and that get's very tiring.