For those seeing the recent event latency warnings, I've just put in a fix
** (inkscape:27965): WARNING **: Event latency reached 3.290566 sec
The main cause of extraneous warnings is a slight difference between the clock used for the GDK event marking and the real time. On my Mac, I observed that the skew was of a constant factor, so I added in an option to compensate for that. On my system the value was 0.9766 (and thus on my system after running for 85 seconds Inkscape would believe a latency of over 2 seconds had crept in).
We'll probably need to investigate this a bit more, but getting that factor in should let people with false warnings get things calibrated and see only good ones.
If you need it, look for the new setting under the misc pane.