The game tells me when I go off track? There's a notification the first time you go off track.
That probably suggest that you don't have the proper FOV when going 2D.
VR:
lap 1 = 1:40.194
lap 2 = 1:07.004
lap 3 = 1:06.378
lap 4 = 1:06.658
lap 5 = 1:05.867
best = 1:05.867
total = 6:06.101
My regular FOV that I've been using for years:
lap 1 = 1:26.801
lap 2 = 1:08.817
lap 3 = 1:07.481
lap 4 = 1:11.202
lap 5 = 1:06.437
lap 6 = 1:10.221
lap 7 = 1:06.689
lap 8 = 1:06.697
lap 9 = 1:10.511
lap 10 = 1:10.144
lap 11 = 1:49.153
lap 12 = 1:06.930
lap 13 = 1:06.001
best = 1:06.001
total = 15:47.084
VR:
lap 1 = 1:24.749
lap 2 = 1:09.109
lap 3 = 1:16.312
lap 4 = 1:07.901
lap 5 = 1:05.410
lap 6 = 1:05.732
lap 7 = 1:05.648
lap 8 = 1:06.319
lap 9 = 1:05.084
best = 1:05.084
total = 10:26.264
2D lower FOV:
lap 1 = 1:34.272
lap 2 = 1:06.087
lap 3 = 1:05.610
lap 4 = 1:10.663
lap 5 = 1:05.336
lap 6 = 1:06.054
best = 1:05.336
total = 7:08.022
I initially dismissed your theory but after thinking about it I thought I'd test myself, why not, its free.
With some earnest back to back testing, you are pretty much right.
Mainly due to depth perception of 3D, I still found it overall easier and less stressful in do faster and more consistent lap times in VR.
[SIZE="6"]Static Scene[/SIZE]
25-11-2020, 19:57:16 acs.exe benchmark completed, 1419 frames rendered in 20.375 s
stock clocks Average framerate : 69.6 FPS
run1 Minimum framerate : 69.2 FPS
Maximum framerate : 70.0 FPS
1% low framerate : 67.9 FPS
0.1% low framerate : 67.3 FPS
25-11-2020, 20:04:02 acs.exe benchmark completed, 1528 frames rendered in 19.703 s
+62 +725 Average framerate : 77.5 FPS
run2 Minimum framerate : 77.1 FPS
Maximum framerate : 78.1 FPS
1% low framerate : 76.1 FPS
0.1% low framerate : 75.2 FPS
25-11-2020, 20:06:05 acs.exe benchmark completed, 1398 frames rendered in 19.907 s
stock clocks Average framerate : 70.2 FPS
run3 Minimum framerate : 69.9 FPS
Maximum framerate : 70.6 FPS
1% low framerate : 68.3 FPS
0.1% low framerate : 67.6 FPS
25-11-2020, 20:07:50 acs.exe benchmark completed, 1564 frames rendered in 20.172 s
+62 +725 Average framerate : 77.5 FPS
run4 Minimum framerate : 77.2 FPS
Maximum framerate : 78.0 FPS
1% low framerate : 75.7 FPS
0.1% low framerate : 74.7 FPS
[SIZE="6"]Video Replay[/SIZE]
25-11-2020, 20:19:35 acs.exe benchmark completed, 4193 frames rendered in 74.359 s
stock clocks Average framerate : 56.3 FPS
Minimum framerate : 42.0 FPS
Maximum framerate : 99.8 FPS
1% low framerate : 42.2 FPS
0.1% low framerate : 39.2 FPS
25-11-2020, 20:22:01 acs.exe benchmark completed, 4609 frames rendered in 74.359 s
+62 +725 Average framerate : 61.9 FPS
Minimum framerate : 46.2 FPS
Maximum framerate : 108.4 FPS
1% low framerate : 46.5 FPS
0.1% low framerate : 44.9 FPS