My story...
Called the store and asked whether they had the 11 and 13 models with 4gb upgrades in store, was told yes.
Went to store, spent 30 minutes going back and forth testing 11 vs 13. Finally decided on the 11.
Told clerk # 1 what I wanted. Response was "those can only be ordered online". Relayed what I was told on the phone, they said that this person was obviously mistaken and reiterated 11" w/4gb were online orders only. I said I needed more time to think.
Spent more time agonizing on 11 vs 13 when another clerk came up. Asked the same question, got the same answer, but this one checked with another to make sure. I pointed out the placard on the table that showed the config and price of the fully upgraded model, but was told the same answer. I needed a bit more time....
10 minutes later, clerk #2 comes back and I say I'm ready to buy, but please let me know exactly which configs they have in store to choose from. She gets on the computer and lo and behold, they have the fully upgraded 11 in stock as regular store stock.
Bottom line: Don't take no for an answer unless you see them actually check the inventory system.