The timings given by PDs can only be as accurate as the sample rate permits. That's why PV should indicate somewhere how accurate the current timing is, based on the sample rate. Otherwise it can happen that a user questions the device timing when in reality the sample rate is simply too low to reflect the real timings.
Note to self: maybe an info message "timing resolution: +/- 5 ms" (half the sample rate) or the like is sufficient.
Ideally, every PD annotation should show this in some way - we do have the timing information already. But how to show this? Tooltips would be convenient on PC but impractical for mobile. Maybe mobile can do without? Needs some thought.