It is your right to be sceptical and believe in this way but I would caution that looking for absence of significant numbers should not preclude a trait's existence. Looking at degrees of talent in this would be more appropriate. Perhaps our feelings of deja vu that many experience are a lesser demonstration of this trait???
Life is not black or white - there are varying shades of grey in-between, and perhaps only the most talented in this area might share a trait at the level where it is functional??? And they may also just as likely have lost or downplayed some other trait in its stead - not unlike functions in type theory??
Not specifically related to just this posited talent but interesting nevertheless:
...Albert Galaburda had been carrying out micro-anatomical studies of the brains of dyslexics. After detailed examination of several cases, Galaburda describes the role of microscopic lesions (areas of damage or diminished growth) and the unusual symmetry of certain formations (the "planum temporale") that had been observed in all dyslexic brains up to that time. Although the cases have been few in number, the results are seen as highly significant, because the probabiity of such consistent results would be very low.
Galabunda observes that the lesions may be capable of suppressing the development of some areas, but he suggests a role for them in actually increasing the development of other areas. This research suggests a biological basis for the frequent paradoxical coexistence of special abilities and disabilities in the same individual.
from In the Mind's Eye Visual Thinkers, Gifted People With Dyslexia and Other Learning Difficulties, Computer Images and the Ironies of Creativity
by Thomas West