The Reich lab doesn't yet have all the Indian subcontinental data on R1a. I say that on the basis that India is too under-sampled compared to the US or Europe; there is a publication underway at the moment that is trying to plug the gap on Indian R1a to an extent. This paper will bring novel R1a SNPs from India to the fore
Plus, Reich et al have just received data from genomewide analysis that shows steppe component in India is not being dictated by R1a as the two groups with max steppe in India are both Hg L heavy (nearly as much L or in case of Haryana Jats even more L than R1a)
I'm pretty sure Reich et al are already making adjustments to their model that may lead to a new conclusion from that lab
Thanks @Kadi. Unfortunately I sense something beyond research from Reich and Co. I hope what I suspect isn't true.