Yes, but the delay is consistent, so it's not that hard to figure out... but hey, if you can't play your class without a perpetually moving timer bar, go ahead and use one.
We can all play our classes without addons of any sort; there is no need for such stupid cheap remarks as that.
My point is simply that I find the swing timer extremely helpful when playing my hunter, and I think that particular feature is just as integral to the addon as the cast bar. I would not like to see it dismissed as a superfluous feature of Quartz and subsequently dropped or neglected. If you want to imply I'm a noob for that sentiment, you may as well paint all caster DPS classes with the same brush, for we all spend our boss fights watching perpetually moving timer bars.