Just to make a comment, as someone who knows several writers, editors, prominent fans and others in the field...hardly anyone calls it "skiffy" and if you used the term out loud most would have to stop a second to figure out what it was.  And these aren't, by and large, people who take them selves totally seriously and go on about art or whatnot.  "SF" (pronounced that way) or "sci-fi" (pronounced the usual way as seye-feye).  The only time I've ever heard it pronounced "skiffy" is to make fun of the people who pronounce it "skiffy".