loosh - very nice image! The focus throw on the ZM35 f/2.8 appears to be the same as the ZM50 f/2 (just compared both of mine side by side) but definitely shorter than the CV35 f/1.2 II, which has a very fat ring in comparison. When I used the 35 on the 5N I didn't really notice an issue, but it also wasn't a lens I used a lot on that camera. How are you usually focusing it? Peaking, magnified view, etc.?
I kind of gave up on peaking for most situations and instead used magnified view because I found that unless working with a very shallow plane of focus, peaking picked up too many areas of high contrast transition that were still out of focus, to make it difficult enough to pick up where the correct plane of focus should be.
For wider angle lenses I found the NEX to be fairly slow to focus accurately at wider apertures because of these reasons, especially compared to a rangefinder camera (though of course the cost of a digital M is very high and has its own range of issues).
Ron