Seems contributers cannot stay on the point of the original post. If the aircraft is good VMC with the runway and all terrain in sight why not continue for a landing (my company SOP). If the situation is in any doubt whatsoever then head for the Moon as soon as possible. Could it be that many of the contributers are so conditioned to "heads down" approaches, even in VMC that they are no longer bothering to clear the approach area visually? (I see many examples of this).
If the approach is IFR or marginal VFR then 90 percent of my scan is inside the cockpit, if the approach is VFR 90 percent of my scan is outside the cockpit precisely so that I can look out for terrain and other aircraft. Do we not teach this as the safest mode of flight anymore? (rhetorical question, I know we do not).
If I have been monitoring the flight path of the aircraft visually for 5 miles with the terrain and runway in sight and a GPWS warning takes place I am in a simple position to assess its relevance. If it is dark and stormy then the GPWS gets instant response. It is quite simple really if you use common-sense (My God, I am agreeing with 411A).
By the way, if GPWS is needed by long-range crews as a crutch because they are tired at the end of a long leg should we not be discussing duty regulations? What are these "tired" crew members going to do if a real emergency, with no "talking prompts" occurs?