I think it may be coincidence that the larger ones were taken, and squirrels may instinctively pick 'larger'. After all, who wants scrawny nuts? (well that didn't sound just right, did it
)
I know they get in my yard and carry off my plant markers, plants that have been there awhile? no, no, no, the new ones that I can't remember the names of... somehow the squirrels know JUST which ones to run off with