Naaah i dont have HDR on, source just runs increasingly pants after each update for me =/ lol. i think its had a fall out with my computer and it no longer likes it
the hdr has been implemented for fps more so than looks, it seems better performance wise than the previous releases.. and i haven't noticed hdr cube maps yet ? wasn't that like half of the big deal. i have to admit though it's sexy as fuck.. really polishes css off well , but for competitive purposes.. deffinately turn it off.. but yea i didn't drop below 60 fps EVER on that map, which considering the way newer maps like assault and inferno were renound to perform like.. i was impressed