At least he didn't answer you in Hz!
A singer I used to play with always talked about how they played in 430, not 440. I listend to a whole conversation before I realized that he simply meant "1/2 step down."
whatever. He didn't even play anything! (but he did a killer mime with your backup guitar--he would even grab a spare cord and act like hu plugged it into a monitor, or something--then people would compliment him on his playing!).
That's good, though--nice point.