Could this explain it?
Well, the link mentioned in a previous post indicates some interesting patterns:
iBook Architecture is assigned an even number (iBooks get 2, 4, and the 12-in Powerbook, the iBook in disguise, gets 6).
From the iBooks, we can also see that the size of the display does not matter, because there is no differentiation for the 14-in iBook.
Real Power Books get odd numbers (1, 3, and now 5 with the 17-incher).
With that knowledge, we can see that the 15-inch Power Book with older architecture had been assigned an initial number of 3.
Since the iBooks tell us that the size of the display does not matter for the number, the 15-inch Power Book can have the same Architecture as the 17-inch Power Book and they can actually have the exact same number... This brings along a very interesting possibility...
In this case, there can be two configuration options for the 17 and 15-inch Power Books that are different enough to have different Model IDs. It's also possible that the 15 and 17 will have one configuration each, and different graphics cards (ATI RADEON Mobility 9600, please!).
And this makes me wonder something else...what about the 6,x model IDs? If screen size doesn't matter for Model ID I have no idea why there would be two unless you have two very different mini Books. Well, there are some possibilities here, but I'll leave it to someone else, my post is too long and too speculative as it is.
BTW: What's going on with Apple these days? They're just letting information loose willy-nilly!
I'm probably way off, but I like my explanation a lot.
I need a new 15-inch Power Book!
Later rumor dudes
