Hatsune Miku: Project DIVA F [BLUS31319]

Maybe it is your monitor? People have gotten perfect score on extreme difficulty after all...

I have my PS3 hooked up on the same monitor and there definitely is no input lag, even without messing with the ingame latency settings. It's slight but I feel that it's there.

You have the reason, for example, the miku project extend has no input lag, it is much more precise

Do you mean Dreamy Theatre Extend?

https://en.wikipedia.org/wiki/Hatsune_Mi...IVA_Extend

For PS3