Everyone plays fps games. This includes people who wouldn't consider themselves "fps gamers". Users who care about mouse input will go into the settings to target the 'correct' settings for them.
For everyone else, there's the OS values.
We're not having the same argument, but I didn't clarify in my initial post properly: It's best to launch your app for the first time with the default OS settings. Let the "power users (fps gamers)" tune settings that enable raw input.
that's just going to result in the non-power-users having a crap experience and not knowing why. Mouse acceleration is not a good match for FPS at any skill level.
I'm not aware of any studies on this, Nvidia did do a study on the effect of sensitivity on aiming [0] but I'm afraid it didn't cover acceleration. Imo it very well could be given how many top aimers and pro players have successfully used configurable mouse acceleration solutions like RawAccel, InterAccel, Povohat's and Quake built-in acceleration. I feel like aiming with acceleration has a steeper learning curve though especially with steeper acceleration curves without an offset, so perhaps I still wouldn't slap default windows acceleration at newer players.
For everyone else, there's the OS values.
We're not having the same argument, but I didn't clarify in my initial post properly: It's best to launch your app for the first time with the default OS settings. Let the "power users (fps gamers)" tune settings that enable raw input.