Oh man, nothing like the hurt feelings of the structured data guys. They've been pushing various designed by committee, magical taxonomy of the universe, semantic web hooey for years.

I especially love the statement from @manusporny that RDFa has grown 500% in the last year... So, 5 people using it now?

I say good on the vendors for jumping out of the analysis paralysis and making something work. We'll improve on it as we go, but a working, living start, is better than a never ending W3C working groups. [see html5 vs xhtml 2.0 and json vs xml]