I couldn't find any mention of ICANN or control over DNS in any of the leaked documents I looked through.
It seems like the article authors or the leakers are "reading between the lines" but I'd be happier to have a link and a reference number so I could read the proposal in context.
ICANN and DNS will be dealt with at conferences in 2013 and 2014. WCIT is mostly about charging for international Internet traffic termination, making the ITU-T's recommendations( which compete with the IETF's and others') mandatory, and getting the ITU's foot in the Internet-regulation door.
It seems like the article authors or the leakers are "reading between the lines" but I'd be happier to have a link and a reference number so I could read the proposal in context.