My son is 18 months and I'm still pumping. Fortunately I work in a setting where my colleagues are more interested in my work than my parenting methods (which is how it should be).*If someone said "STILL expressing milk???"*to me, I would probably just smile and say "Nothing but the best for my little man."
As far as the Time article, I think it is different when people are talking about a magazine article versus talking to a real life person. It's easy to have an opinion about something to which you have absolutely no personal connection. Opinions can easily change when you know someone doing something successfully. At any rate your parenting is none of your colleagues concern, and I would treat it as such.