> Honestly, I don't even plan to use the feature in question. Last night I was playing > around with all the settings and noticed the big drop in performance with the feature > enabled compared to its behavior in u4.
Contrast your report to MilliGoodz's. It's all there why he got an admission of fault from MG and you got a Bronx cheer.
Put more clearly: any report on HLSL must include at a bare minimum the model of video card you're using and the output resolution. The driver version and a list of the HLSL settings wouldn't go amiss either.