Is the K10D Really Sluggish in Shutter Lag?

This has been a hot discussion and debate topic for months at various Pentax forums, which is solely about the system and/or AF time lags and the actual performance of the K10D in this important (IMHO) aspect. Here is one of the examples. Some people do have suggested that the time lag is actually just a feel caused by the sound(s) of the K10D generated during a shot (example here), but then