At the risk of fomenting YARTism, I'd add the following to the discussion. After the thread a bit ago on acronyms, I felt like there was pretty solid consensus about the meaning of the word (i.e. scuba and laser qualify, PC doesn't). This link doesn't completely shoot that down, but it leaves it more open than I'd hoped:

http://www.randomhouse.com/wotd/index.pperl?date=19980825

I guess we have to consider ourselves "non-specialists," per this piece, so the meaning I like seems to hold.