On the other hand L is not that strong in all areas where R2 is, today in India R1a1 and R2 go hand in hand and are strong and weak in the same communities and areas, L (L1 mostly) is mostly on the western side and sort of very weak on the eastern side, this tells me that the R1a1 and R2 people might have had a similar migration time-line to India and were probably the same stock for most part when they arrived.