Except that they have been saying "Don't Buy - Updates soon" for the last three months.
If not for the iPad launch, these laptops would probably have been released in February, so saying "Updates soon" for three months is about as much as could be expected.
If it's been less than fourteen days, you can return it and only pay a restocking fee to upgrade.
Between the (10%) restocking fee and the pita-ness of switching machines, I'm not sure that's such a great deal. :(
(I added my own SSD to mine, so it's not just a matter of Time Machine.)
If you're a business customer they'll often exchange your Mac without charge if you bought it within the 14 day grace period. That's been my experience anyway...