Well price drop rumors haven't really been that rampant. Actually it is more akin to MS with the Arcade back in 2008. They were out there and became more definite about a week or 2 before but nothing widespread. Meaning the pricedrop is going to be something that a few educated know right about when it comes out and everything else builds off marketing and in-store knowledge. If you look at 360 sales in 2008 after the pricedrop you'll notice not a huge opening but a very steady and stable progression to it's huge holiday season.
Actually that's the norm for most pricedrops. The Wii pricedrop will probably be very similar, although considering it has yet to saturate a still huge market and still selling really well in it's lifecycle, it could have a much larger potential increase in the holiday season especially with very large key holiday titles along with ones that have been released as well.
PS3 pricedrop/new SKU was actually not the norm. Was something more like DSi, mainly because of the new SKU part. But had a lot of time where the rumors were rampant, became very mainstream, and obviously had a lot of people for over a year waiting for this to happen. Thus it got a much bigger increase on it's first week, but it has also led it to have much larger drops than usual which will continue this week and thereon. Less stable of course. Who knows where it'll stop but that's the difference.
So it's really hard to compare what is going on with Wii right now to PS3. Wii sales have already been around in this range and have held on pretty steady considering all the rumors. I would expect though, that we may not even see the effects of rumors because it's been kept out of the mainstream (which is great for pricedrops). Then of course a nice bump on first week and then will probably follow the patterns of 360 with steady progression, stabilization, and then big holiday bumps.
