Just called Dell again and the CSR still had a shipping date of April, 13th - online delivery still April, 14th, which gives them two days to complete my laptop

Seeing that some jumped from "pre-production" to "shipped" directly, it's not that unlikely - but I still doubt it. Am already getting my hopes up again, damn.
Anyway, the reason why I called was to find out about my discount and she said that it was already in their system and I wouldn't need to do anything. Seeing that she knew what she was talking about, there really WAS something in the system (unlike with many of those fake callback promises), so I am hopefully that I will really get it. They didn't take any money from my credit card yet anyway, soooo...