I've said all along that with 1 exception I've never been "charged" prior to shipment. Today I have to amend that statement. Last night I ordered 2 items from Amazon.com, one who I claimed never charged me prior to shipment. I just went on line to view pending charges on my CC account only to find 2 "Temporary Authorization"(s) dated yesterday for last night's order. Has this been charged to my account? Technically no but the funds for last nights order are not available to me at this time. You could say there is a difference between "charges" and "authorizations" but the effect is the same.
The bottom line - if you don't have the money for it today don't even consider pre-ordering.
Oh, by the way, that "crow" I'm eating right now is quite tasteful. :-)