Douglas, I posted yesterday over at personal-view; I ran a sync test yesterday (cameras: X-E2, G6, GX-1; two recorders: Sony PCM-10, Zoom H2n); my X-E2 cannot maintain sync over a ten minute period.
All except the X-E2 are frame-accurate sync over 11'; the X-E2 was 15 frames late, sound and vision. I have posted on this problem on the X-Trans forum too; I noticed the sync had drifted in a shot YT clip I made last week. but yesterday I realised that I had assumed that the H2n had not drifted over that period—so I decided to test properly.
I do not understand how this kind of drift could have been missed by the engineers; I have work in film and video for 30 years, and anyone can see a three-frame out of sync problem in dialogue, and some can see a single frame.
I have my Fuji X bodies for sale on Fred's site, too, if anyone's interested. The X-E2 makes excellent stills, and has lovely ergonomics, but my work is 70% video these days so while I do not love any of the Panny bodies, I have to give them kudos for their excellent video.