Let me remind you that TheSource is one of the persons behind VGChartz numbers, I wouldn't trust more in my own opinion on the matter than on his opinion.
As for your answers:
Pricecuts: 360 didn't had a price cut since 2008 but many models have come and gone, and now the redesign model. Same for PS3. Wii had nothing of that. Just one single price cut in its life. Period.
Zelda: The highest selling Zelda made like 7M copies and it is Ocarina of Time. Yes, the Wii will have every xmas an hardware booster. Its been like that on Nintendo consoles since forever except when a successor is to come or is already in the market (Xmas 2012 for the Wii won't have any major title I'd guess, xmas 2011 won't have any major DS title because of 3DS)
Redesign: 2 gb of flash memory, wiimotes plus and a sleeker design would be enough, afteral the 360 slim just got WIFI and a new design and lifted up sales.
On the last four months: The Wii has been doing good for a console that had no price cuts, no new models and lackluster software. If that happened to any HD consoles, now you would know what low sales is (50k weeks or even lower, like we've seen on 360 and PS3 already)
