Words, words, words

I spent a fair chunk of time tonight on the phone with a tech support guy at Comcast, trying to resolve a connection problem. (It's working now, obviously.) At one point in the conversation, after he'd told me to change a computer setting, I said, "Okay, it seems to have reacclimated." He said, "What?" I repeated myself, and he asked me to define "reacclimated." Then he asked me to spell it. Then he got all excited about having learned a new word, and started throwing it into the conversation at random moments. Which was amusing, but... I didn't think that was such an obscure word. What do you think? Was he out of touch, or have I just been spoiled by having intelligent and well-read friends?