Floyd's findings sound very interesting, but until his book (or article?) is actually published (if only self-published), this can hardly be considered to meet the Wikipedia definition of a reliable source (RS).  His actual press release, FWIW, is at http://www.maphist.nl/forum/viewtopic.php?f=2&t;=360 .   At the very minimum, this should be cited directly, rather than via press accounts.