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Also it would have to be paired with fact that the specimen (almost exclusively associated with Y-DNA R1a1) from South Siberia and Kazakhstan (*) had almost exclusively mtDNA haplogroups of west eurasian/european origin especially during bronze age (as far as 1,800 BC). If we link that with the europoid phenotypes with light-colored eyes and hair and pale skin of andronovo south siberians described in the recent article of human genetics 
( http://www.springerlink.com/content/4462755368m322k8/ ), that's meaningful and favors an European origin of these R1a1. 
Especially since no south Asian haplogroups are linked to the spread of R1a1, up to Europe. 
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Pretty meaningful, especially since such phenotypes are found where high frequency of R1a1 are found in Asia (like 
Kyrgyzstan, Tajikistan, east Afghanistan and north Pakistan) -> examples of such clearly europoid phenotypes in these regions of Asia that matches the description of south Siberian of Bronze age (andronovo culture horizon), 
here  http://pastmist.wordpress.com/ 
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Sounds important to me. 
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 (*) http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1691686 (Unravelling migrations in the steppe: mitochondrial DNA sequences from ancient central Asians.)
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82.241.221.24  calabasas