Image quality results from the Canon EOS 60D have now been added to Canon EF 100-400mm f/4.5-5.6L IS II USM Lens page.
Here is a preloaded comparison between the version I and II lenses tested on the 60D. The difference is very noticeable.
Next up: Image quality results from the EOS 7D Mark II. The 7D II is sharper at the same sharpness setting and this should be reflected in the results.
B&H has significant quantities of the Canon EF 100-400mm L IS II USM Lens arriving regularly.