Yep, I get the mobo logo too now, after I updated my BIOS to support Windows 8 UEFI. Thankfully, AsRock has a smallish green logo, and not a gigantic in-your-face logo.
Sadly, my graphics card (EVGA 680 GTX) doesn't support UEFI-GOP, so I can't do the ultra-fast boot option. According to their forums, EVGA plans on releasing an optional firmware upgrade to enable it in their 6xx lineup...







