Many linguists have commented that these proposed dates of separation are 'too early,' but how . . . do they know this, or judge this? - Colin Renfrew

In this way it might be argued that, from the very earliest farming times, as represented by Mehrgarh and by other sites later, an early; lndo-European language was spoken in the Indus valley and in areas to the north and west.

As Renfrew put it in his archly-titled review of Mallory’s book – ‘They ride horses, don’t they?’ – the horse has assumed “an almost mythical significance in traditional Indo-European studies” (1989: 845).

As far as I can see there is nothing in the Hymns of the Rig Veda which demonstrates that the Vedic-speaking population were intrusive to the area: this comes rather from a historical assumption of the "coming of the Indo-Europeans." .. Nothing implies that the Aryans were strangers there.