HC800 is approaching track pads specs, so not really surprissing it performs better at higher temps. But look at the web diagram you're trade off would be extra dust and noise.
I thought double R Ron was running them in his F6, but they again he does't drive his F6 much so probably couldn't give daily use feed back, Possible Kyle is running them as well?
I reckon the HC800's would love to snack on a rotor or two.