I'll be getting the 90D tomorrow about 2 pm. Timetable is first to AFMA with 100-400mm II and 400mm DO II. Then, compare resolution using charts with 5DSR and 5DIV. If time, check out any shutter shock. Maybe time to report back here. Saturday, local bird reserve with hopefully a few birds around as it is a lean time of year, and further reporting.
It's sort-of the closest thing to the M6-II in many respects--but then again not really. Looking forward with interest nonetheless.