Why does Georgia have the highest amount of "west asian" (middle-eastern?) DNA?

[Seanp]

Genetic distance by inferred ancestral population

	Georgian	Sardinian	Mozabite	Lithuanian	Saudi	Basque
Georgian	0	0.048	0.071	0.039	0.059	0.049
Sardinian	0.048	0	0.073	0.041	0.061	0.046
Mozabite	0.071	0.073	0	0.069	0.077	0.077
Lithuanian	0.039	0.041	0.069	0	0.059	0.04
Saudi	0.059	0.061	0.077	0.059	0	0.067
Basque	0.049	0.046	0.077	0.04	0.067	0

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Lithuanian reference population is the closest to Georgia based on K6 made by Razib Khan.

As we know Georgians have one of the most CHG/Caucasus like admixture, i would consider the possibility the Caucasus and North European like components share a common ancestral origin which would correlates with linguistic and culture if we consider Georgian is one of the oldest unique Ind-European language and i would go as far to say the majority of West Eurasians excluding the Semitic speakers share a common North Caucasian-Southern Steppe origin.

I'd also add Georgians have significant Iran Neolithic admixture component which might be the ancestor of all Indo-Aryan/Hindu Kush civillizations from Kurdistan to North India.

Source&Map:

http://blogs.discovermagazine.com/gnxp/2011/04/gene-flow-stops-at-gibraltar-mostly/#.WHAA-blV66g