the article in question has a bunch of factual errors.
for example.
For so long, AMD enthusiasts have to resort to unofficial patches to make SLI work on their boards
There were never unofficial PATCHES... there were CRACKS... for the DRM... that nvidia put in their drivers. nVidia sells an encrypted set of keys which are stored in the bios of dual slot boards at a cost of 5$ per mobo sold. Their driver's then include DRM that turns off SLI if the keys are missing, unless the drivers have been cracked... no different really then any cracked game or program you download online. This is not the only DRM that their drivers have BTW, they also prevent you from using an nvidia card as a physX card only if an AMD card is detected in the system.
It is very good to see nvidia finally cave on this issue and allow everyone to use SLI. although you can be sure this is a calculated economic decision. (they figured they can make more money by lifting said limitation then they can from the 5$/mobo...)
As mentioned by people before me, this article has no source to back it up. So I wouldn't celebrate just yet