I agree alot with what you are saying Res, time will tell a lot of it.
The Mega is really about the socializing and celebrating. I went to GW VI and the caching I did do that day I had to stand in line to sign the logs.
I am interested to compare it to Rendez-vous to see if there is any differences. I loved the Mega, met so many great cachers including Canadians, that I would probably never meet except here on the forums.
I'm not sure about other parts of Canada, but I just don't think it's possible here in Ontario to pull off a mega event, atleast not here in Southern Ontario where I am from. I honestly don't think anyone could do it at the moment. Maybe Ottawa could. We've just hosted a very large event here with a goal of 300 attendees and fell just short of that mark (we would have been the first to pass the 300 mark in Ontario, but unfortunately the rain kept some people away). Others have had their sights set on mega in the past and got less than half of what they expected. For us in Southern Ontario a huge event would be 200-300 people and that would be a handful and a lot of time to organize based on experience.
Although it sounds cool at the thought of hosting or attending a mega event, and we'll be attending our first one in Quebec and are looking forward to it. Sometimes bigger isn't always better. These big events seem to be more about socializing and selling wares than about geocaching and related activities.
If someone could do it in Ontario, it would be great. It has nothing to do with being a non-believer, but instead on experience and knowledge that I base my comments on. I am sure it will happen one day, maybe in several years from now, but I just don't see it happening anytime in the near future (who knows, maybe my comments will spark a fire under someone to actually try for it in Ontario).
The way I see it, you need the right group of people with a solid plan and appropriate financial backing to be able to pull it off, and I am happy to see that Quebec has all of that.