With me, it kinda depends on the venue and the shooting conditions. At WDW last summer, for example, I shot over 2K pix, and of that number, would guess somewhere around 400 were "keepers", and a handful being potential candidates for enlargement to 8X10 or so. I had a lot of duplicates of nightime shots, as I would typically shoot multiples to try and insure at least one keeper. I did a lot of "grab" shooting, as I ran franically, trying to keep up with Mrs. YEKCIM, so some of those were culls, too.
On a trip to the Blue Ridge mountains last fall, I'd say that the averages were about the same, maybe a little less, due to duplicates and some which were taken in less than ideal lighting.
On some of my recent zoo trips, I would say that I got less keepers, due to lighting and lack of cooperation by the subjects (the animals on Jungle Cruise seem to be more cooperative, somehow).
My theory is to just shoot everything in sight and keep the keepers. After all, it doesn't cost any more to shoot a few extra.
How are you liking the K10D? It was on my short list for a while, before I joined Team Nikon.
~YEKCIM