The whole HMD experience is very personal. That's why FOV, comfort, SDE ect ect differs from person to person.
I just made a shocking discovery for me personally : I tried my rift without the foam insert and got a much larger FOV and sharper image. This is just to illustrate how personal the use of HMD is, because we all have different facial structures.
The good news for the " Rift Camp " is :
Codemasters have just confirmed that Dirt Rally will get Oculus Support with the release of the next patch