"It's probably safe to assume that Gigabyte planned to release an SLI-certified BIOS all along, but that the Taiwanese magazine stumbled upon the ability before Gigabyte could get the official Nvidia certification."
I don't know if I'd call that safe to assume. Not with that wording anyways. I'd call announcing your motherboards support SLI and that there is a bios patch, different than official Nvidia certification. Also it may not be the same as official Gigabyte support. In other words, you can dl it and try it, if it doesn't work for you for some reason I doubt they'll send you another board. They'll probably tell you if you want official SLI support, but the official SLI mobo.