I have an ASRock Z87 PRO3 with an I5-4570S, and this issue has been fixed for me. I'm still not entirely sure how, although I suspect it was an ASRock BIOS upgrade.
At this point, I'm only following this thread due to technical curiosity.
This issue *is* getting fixed. The fact that you don't see it happening instantly doesn't mean you should grab the torches and pitchforks. BIOS development *cannot* be rushed, or you'll end up with a bricked motherboard instead of a solution.