[quote name='shrike4242']By BB policy, they're supposed to call 100% of the time and verify the item is in stock. In practice, it's not anywhere close to 100% of the time, so more times than not, the other store not having the item in stock is a non-issue.[/quote]I think adherence to this policy may depend on the density of stores in your area. For example, I can think of six Best Buy stores and five Circuit City stores within driving distance of my home -- consequently, customer service will typically just assume that one of the "local" stores has the item in stock, and forgo the call.
Then again, there's always a chance you'll get that one stalwart individual who makes it a personal challenge to find some reason to deny you a price match. (I've worked in customer service before, and I still have no idea why these people exist.)
...In summary: It's a total crapshoot.