keyboard shortcut manager latency

[Jani Monoses]

Hello

while testing the responsiveness of xfrun I found that keys that are 
bound using the shortcut plugin have a different behaviour than the ones
hardcoded in xfwm. For instance while reaction to alt-f4, f5 etc is 
instant once the two keys are pressed simultaneously, for the shortcuts
I have to keep the modifier key (alt, shift) pressed for about 100-200 
ms and only then press the other key otherwise the action does not trigger.

Do others notice this?

Jani