Let's do a poll without a poll, for my further edumacation:
Where do you hang most of the time (in terms of climate/weather)?
Has your UQ ever gotten wet - was it soaked, splashed, damp, or dunked?
What did you do next? Go home, wait for the rain to stop and dry it out, build a fire, get out the spare UQ from your pack, steal a dry one from the hanger next door, whip out the emergency blanket, use it anyway?
If 'twas a down UQ, did you immediately run out and get synthetic, or did you figure out a way to prevent the wet next time under the same conditions?
If 'twas synthetic, was it everything we seem to expect synthetic to be - the answer to keeping warm with wet gear?
Real world experience trumps 1,000 flame war threads about down v. synthetic.
If you bought synthetic - was it a price issue or a fear of getting it wet? I'm seeing that down and synthetic versions of half or 3/4 underquilts are priced about the same. I know that down will compress better. Wondering if there are reasons I have not yet discovered for choosing synthetic over down.