Yeah I was mistaken, when synced to display at 60Hz, the delta log looks like:
I am curious about why your measured deltas don't vary, have you tried logging them to a file?
... 0.016761 0.016591 0.016652 0.016698 0.016710 0.016666 ...Which over time seems to average out to the correct value, but yes, there is jitter.
They actually don't average out to 1/60 - they're generally higher than 1/60[/edit]
I am running my physics on a fixed time step of 60Hz (with some internal parts of the physics taking 10 sub-steps for each 1 physics tick), so it seems that occasionally I should actually be doing no physics updates for a frame, followed to two the next frame. Using a minimum delta of 1/60th (and the correction buffer) might smooth this out. Thanks.