Semantic Web does not need OWL?

At a recent conference in Corfu Jorge Cardoso from University of Madeira gave a keynote summarizing a report which will appear in the IEE Intelligent Systems. The report titled The Semantic Web Vision: Where are We? basically is a result of a survey which was conducted between December 2006 and January 2007 of approximately 627 participants.

Most interestingly, the report concludes that:

"the large majority of ontologies developed are rather small. It shows that the Semantic Web does not even need OWL and can achieve important objectives such as data-sharing and data-integration using just RDF alone. "

Interestingly enough, the first day's keynote speaker, Grigoris Antoniou from University of Crete and FORTH, also stressed that although rules are needed to further exploit the real strength of ontologies, lot can already be done by RDF(s).