'Infinite series' in math wrongly attributted to Newton?

ScienceDaily has the story about some new claims that infinite series in math, one of the building stone of the foudnation of modern math, has been wrongly attributted to Sir Isaac Newton and Gottfried Leibnitz.
The real discoveres were members of the Kerala School of math in India, back around 1350, several hundred years before the discovery was attributed to Newton and Leibnitz.

Indians Predated Newton 'Discovery' By 250 Years, Scholars Say

A little known school of scholars in southwest India discovered one of the founding principles of modern mathematics hundreds of years before Newton -- according to new research.

The claims are the findings of Dr George Gheverghese Joseph, who discovered it "while trawling through obscure Indian papers for a yet to be published third edition of his best selling book 'The Crest of the Peacock: the Non-European Roots of Mathematics'".

While I find this interesting, I am skeptical, and would like to see the findings verified by others. And even if it's true, it seems somewhat unlikely that the knowledge travelled from India to Newton through Jesuits monks, as Dr Joseph think might have happened. If that had happened, there would likely be some kind of records of this knowledge - Jesuits were known to write a lot of stuff down.

Anyway, quite interesting.