Is it always been there or is it a recent SVN addition?
By the way I noticed just today and just love it!

Disabling filters makes the display refresh so fast, making my cry thinking of how many hours I spent waiting for the redrawing of complicated works.

I just set two macros in Stroke-it (mouse gestures program) to switch the view from Normal to No filters and back, so I can preview the real thing in an eyes blink, and thereafter work fast, also when zoomed in.