Seriously....kiddo?

We had carpet installed the other day in Emi's new bedroom. I got talking with the installer who was probably in his forties. After a fairly lengthy discussion about the different contractors we used for our basement, he said, "alright, kiddo....we're out of here". Kiddo? Not that I especially love when I am called "ma'am", but have I not graduated from "kiddo"? Honestly.....it bugged a bit. Would any of you be bugged by "kiddo"?