Based on that sentence, there is an interpretation that would make that true. The idea that the matter may be discrete rather than continuous is quite old; the word "atom" after all from ancient Greece. Wikipedia also mentions Indian philosophers had the idea. Of course, they never were able to prove that the idea was correct, and a modern educated viewer can not help but bring in the modern view of the atom when they see the word "atom" (protons, quarks, gluons, etc), but the modern view would not match either the Greek or Indian conception. The word choice of "stated" is correct enough; they did not prove, they did not demonstrate, they could not resolve the argument, but the very fundamental root idea was recognized.
Similarly, the modern ear hears "relativity" and can't help but think of Einsteinian relativity, but the adjective "Einsteinian" is not redundant as it is not the only idea of relativity. Relativity as a concept also goes back a long way, but it looked more like Galilean relativity (if indeed it was even that formalized, which it probably wasn't), which contains certain contradictions in it which can be determined with pure reasoning, and indeed may have been (see [1]).
The summary leads to misleading ideas about what the Indian philosophers really knew/discovered/thought, if for no other reason than there is no way to accurately summarize the ancient ideas in modern words that briefly; it is not clear to me whether the author of the linked web page is himself confused or being deliberately mendacious.
[1]: http://mathpages.com/rr/s3-07/3-07.htm , and indeed, the entire first half of that book or so. Among this book's many points is that physicists were seriously beginning to consider whether they were going to have to give up on the general idea of relativity until Einstein was able to rescue it.