It's very annoying to me… it defeats the purpose of "always on". I'm looking at it now as I type, and it's sitting there 14 minutes behind.
The always-on feature is literally based on the fact that this won't happen. Otherwise, why would you have an always-on screen? There's no point in having an inaccurate always-on; in fact, you'd want to turn the always-on feature _off_ in order to make sure you don't get the wrong time.
Interestingly, a notification came through, saw that, and the time *still* wasn't updated.
Really poor.