It really makes sense for them to strech out the 500 series since it crushes current software for single display 1080p users. It is never worth it to wait for tech, if you need it, BUY IT!
Have you ever worked in a large corporation or institution? Most I've been associated with like to see their name and logo on everything and in every sentence of any text or speech associated with them. So that per se isn't a reason to doubt it.
Why would AMD make one that looks exactly like it before the release of the 6xxx series that turned out to be completely inaccurate?
Hey! Bun! We need some hits on the website, go make up a chart!