[PatrickHenry]

We've known this [the Indian origins of the Gypsies] for decades because the Romany Languages are clearly descended from Sanskrit.

Yes, but as the article points out:

"There are quite a few examples where a population adopts a language but this does not necessarily mean its biological roots belong to the same place as the larger population that speaks this language," she [Professor Luba Kalaydjieva] said. "So from the biological point of view we have provided we have provided the best evidence so far that this is indeed a population that derives from the Indian subcontinent."

[VadeRetro]

Cultural assmilation exists, yes. But it's improbable that a bunch of people who have spread all over the world and speak an Indian language didn't initially migrate out of India. Duh!