I've pronounced it like JIF since the mid-90's when I first learned of GIFs. I've had to send many people here to prove I wasn't crazy: http://www.olsenhome.com/gif/
Linux is pronounced with a short i, but most americans say "lie-nux". As a german I say "Lee-nux".
Xing is allegedly pronounced "crossing", but I say "ksing".
I think we would say "queue-tee" if it was QT instead of Qt. To me, "cute" makes more sense for "Qt".
If Syosev wanted people to pronounce it "engine x", he should have called it "engine x".
Got any info on this? I've heard this only several times (i.e. rarely). Always from people who are used to the "crossing" signs, but never from anybody else.