No windows tweaks? Or bad antiviruses like kaspersky that eats a lot of cpu and constantly monitors the system. I noticed better responsiveness after changing from Avira to Avast.
I did fresh install one time and it was less responsive than tweaked w7. I had same exact drivers, antivirus and software.
Something like hid input service or core parking might have had noticeable impact. Or other things that might eat cpu cycles or poll system for key press.
Does java really have a noticeable impact on latency? Dunno how to play minecraft without it.
Why not 0 pre rendered frames? You dont feel any difference between 0 and 1?
I know it cant be really 0, as it does not work that real time, but it doesnt default to 3 in most games, as 3 are noticeable delayed.