That makes about as much sense as a home builder saying his 5000 sq ft. mini-mansions have cable jacks in all rooms. However, his 1500 sq ft. bungalows have no cable jacks so if you need cable jacks buy the mini-mansion, even if you are single w/o children.
But there's very little NEED for either cable-jacks or ExpressCard. ExpressCard is needed for some audio and video-work. And people who do those most likely need as big screen as possible, so it makes sense to keep it in the 17-incher.
Fact is that there are very little things that absolutely NEED ExpressCard-slot. Those that do need it, can get the 17" MBP. For everything else, there are altnernative ways to get the job done.
There are people who find the 15" the sweet spot of the line - not to big to travel, not to small to work with; video out if a bigger monitor is needed. It's not possible these users have no use for an ExpressCard slot? I know what Apple said -- but the logic is flawed and clearly bent for Apple to justify removing the slot.
Of course Apple can't offer every single combination of their hardware that will satisfy everyone 100%. They need to find a middle-ground somehow that will be as useful as possible for as many users as possible. And you can bet that Apple has detailed information regarding use-patters on their hardware. They don't make changes like this on a whim. They probably noticed that most people never touch the ExpressCard-slot, and of those that do, half use it for cardreader.
OK. So they removed the slot and told us why. That brings us back to the SATA issue. Don't you think Apple should at least explain why previous versions had SATA II and the newest version does not just as they explained why ExpressCard went away?
I have no idea. My bet is that it's a firmware-problem, since the hardware obviously supports it.
The more I read these discussions, the more obvious it becomes that people just need to have something to whine about. When unibody-MacBook was released, people whined because it lacks FireWire. Now Apple brought FireWire back to it. And they increased the RAM-limit to 8GB. And they added a card-reader. And they increased the specs. And they increased battery-life. And they improved the screen. And they lowered the price. So Apple fixed the #1 complaint people had, and added a lot of new stuff while lowering the price. So all is fine, right? Wrong. People find something to complain about EVERY SINGLE TIME. This time it was the lack of audio in-port and integrated battery. And now they found another point to whine about: the SATA-bus. When the fact remains that all three of those complaints are very, very minor when compared to the things that Apple added.
You can be damn sure that if the MacBook still had audio-in port, had SATA 3.0 and removable battery, people would still be whining like there's no tomorrow.
same thing with other MacBooks, more or less. It just boggles the mind. If Apple released a laptop that was made from gold-pressed latinum, had a CPU and GPU that ran inside a warp-bubble and used giga-quad datacrystals for storage and came with a personal holodeck, people would still whine. "No, this is the worst laptop Apple has ever made, that's it, I'm going back to PC's!".