Just a personal observation, but a distinct lack of China coverage. On IVAO, China was (is) an upcoming division, I know some of their staff from my IVAO-GB days and I know full well that they have ATC exams regularly (I've flown in more than one). If the rest of Asia was as well covered in IVAO as it is in VATSIM, fly-ins in the region would be excellent... is this just "one of those things" on VATSIM?
(All the more reason for wishing the two networks would come together, if only every once in a while... just imagine if you will, VATSIM and IVAO keeping their own software but actually sharing networks/virtual airspaces - the coverage would be amazing)
EDIT: And didn't realise it was *that* late for you folks... I'd deliberately chosen to fly "local time=zulu" rather than real-time, so I got daylight the whole way. All the more impressed...