This is a badly researched article.

Posted May 26, 2010 17:36 UTC (Wed) by Sho (subscriber, #8956)
In reply to: This is a badly researched article. by foom
Parent article: Swift and predictable reactions to WebM

While I agree with you, it's worth mentioning that Google worked together with the Matroska folks on WebM, and that the Matroska website has posted a notice of full support, as have individual Matroska developers in their blogs.