yeah I usually get the "boy you got your hands full" when I am out with my 4 kids, youngest in my carrier. It is usually when I am really multi-tasking and doing a good job that someone says something. I usually say with a smile, "I do and aren't I so lucky!" No one notices (or maybe they are afraid to comment with steam coming out of my ears) when I am struggling to stay sane when shopping and my older 3 are running around. I take it honestly as only a compliment.
I am all for the Sling Addicts Anonymous group, as long as we make it a group member perk to get 10% discount on new baby carriers!! I can never have enough Ha-Ha