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BTW, I have a question for you regarding the World of Greyhawk setting. I was just perusing the encounter tables in the glossography recently and noticed that a fait amount of them include results for "Men, Cavemen" (areas such as Blackmoor, Sterich, Valley of the Mage, the Barrier Peacks, Crystalmist Mountains and Jotens, the Clatspur Range and Yatil Mountains, the Hellfurnaces) and even a "Use Plestocine Conditions Encounter Table" (Sulhaut Mountains).
Did you envisions these as the WoGH's "Lost World" type areas (particularly the Sulhauts)? I noticed they were fairly spread out on the map so it could also have been simply considering the Cavemen as a less developed subset of humans. Also, did any of the OC's in your campaign ever encounter their Neanderthal brethren or any Plestocine creatures in the WoGH proper (not, for instance, in Isle of the Ape)?
Gray Mouser