Anyone know how to skip cutscenes? I know the WR run did some trick to skip the end-day cinematic, but I've not been able to reproduce them.

It only works in fullscreen in D3D mode. Just wait for the cricket sound to begin, alt-tab to Windows, and then return back to the game when postal dude/his wife stops talking, usually in the middle of a sentence. Btw, there is a new patch coming soon which will allow us to skip these cutscenes entirely, so this trick will only be required for "piss on dad" cutscene as it's the only one which saves time.