I donʻt get asked by random people, but I do sometimes get asked by people I know while I am out and about, reading. I have only seen one person irl with an ereader (a random person across the plane aisle from me). It was a kindle. I have a sony.
when people do ask, I get in full on advertiser mode, though! They find out more than they even wanted to know about ereaders. Most are pretty interested in getting one of their own. Invariably, they ask me if mine is a nook or a kindle though. *sigh*