yep - mee too, running on 60 FPS, all fine & good, but at least 5 to 10 times a minute the screen seems to stutter/hang for some 50 ms, occasionally one can glimpse a (4 x ?) enlarged frame, then it goes back to normal....
very annoying, even without VR. with VR I can image completly immersion breaking.
Also the duration of the stutter varies, sometimes nearly not recongnizable, sometimes up to 0.5 sec - comes along inconvenient if you try to time your SCO Boost.
DId overshoot frequently just because of that.
Didn´t report it as I thought my rather old Graphy Card would be the reson, but as You experience it too, well....