When using HMD camera tracking adding a (StaticMesh) component to the Camera component results in a bit of lag when looking around with the VR headset.
Add a CameraComponent to a pawn
Add a StaticMeshComponent as child to the CameraComponent
Player in VR-Preview
The static mesh will lag a little behind when looking around with the HMD.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-33928 in the post.