That was a long read. I see you put in some of your things from other places, it actually almost became boring because I've heard you say everything before :P
What might be interesting, is to look at how "casual" each system is. By using your after 10 week strategy that is. Hmm.
For this gen, the game will have to have been out for 40 weeks, and everything will be counted for first 10 weeks, then next 30, then full out. Could be interesting...
Twilight Princess:
First 10 weeks in each region: 2.3M.
After 65 weeks in each region: 4.6M
That's 50 % casual and 50% hardcore. This one is a bit flawed, due to hardcore getting Wii later, though.
Gears of War:
10 weeks in each region: 3.3M
After 70 weeks: 4.9M
67 % hardcore
33% Casuals
I could make a "leg calculator" by this. How much each sells in Japan first week and how it will keep up and such. Think it would work?
http://www.vgchartz.com/games/userreviewdisp.php?id=261
That is VGChartz LONGEST review. And it's NOT Cute Kitten DS
