Robert Kurzban clarifies the concept of the EEA (mostly by quoting various excerpts from Tooby & Cosmides). I think this is an important post for people to check out, given how often the concept of EEA is referenced on this site.
In 1990, Tooby and Cosmides wrote (p. 387):
The concept of the EEA has been criticized under the misapprehension that it refers to a place, or to a typologically characterized habitat, and hence fails to reflect the variability of conditions organisms may have encountered.
From this it can be seen that even in 1990, they were taking pains to defend against the possibility that careless readers might take them to be saying that the EEA is to be thought of as a time and a place. Instead, they characterize it this way (pp. 386-387):
The “environment of evolutionary adaptedness” (EEA) is not a place or a habitat, or even a time period. Rather, it is a statistical composite of the adaptation-relevant properties of the ancestral environments encountered by members of ancestral populations, weighted by their frequency and fitness-consequences.
I find the matter unclarified. Given the large variability of the Pleistocene climate and habitat (that Kurzban mentions), what does the quoted definition of the EEA mean? "A statistical composite...weighted by frequency and fitness-consequences" looks pretty much like a time and a place -- just an average one instead of one asserted to be the actual environment, habitat, and social structure over the whole Pleistocene. Both concepts ignore the variation.
If it's worth saying, but not worth its own post, even in Discussion, it goes here.