Completely agree, it's quite bizarre... although I hasten to add I think it's very much the instrument not the playerwith me! First time I took one down to the local Open Mic I suddenly had loads of people I'd seen month in month out suddenly come up and talk to me. I was inexplicably promoted to "one of those clever b**tards that can play anything" (my previous performances on other instruments hadn't warranted such an observation) and I suddenly find that despite playing similar lines the perception of the bass player goes from "crap guitarist" to "musician". FYI it also seems to work for mandolin, although in a slightly less dramatic way
Around here everybody also seems to default to a Carry On Film status and remark on it's size too