I think Apple has some interesting protocols in place to handle people who aren't "satisfied." I called merely to switch to expedited shipping. Was more than happy to pay for it since I have a few time constraints. The rep told me that all orders are sent expedited, so even if I'd paid for it I wouldn't have been charged for this preorder's faster shipping. Interesting, I said.
He then asked me if this was an inconvenience to me. After I said "yes", he offered me Magic Mouse for free (I ordered with a Trackpad). I said yes, of course, to the offer. But it was interesting that he WANTED me to say it was an inconvenience, so that he could "fix it." I'd love to see the Customer Care guidebook they have at Apple.
*EDIT*
Yep, Magic Mouse coming via free Next-Day shipping, delivers December 4.
Interestingly, my 27" iMac says the same thing now in terms of shipping speed.
"Available to ship: 2 - 3 Weeks
Delivers Dec 21 - Dec 28 via Next Day Shipping"