Well, if your BTO is coming out of Asia to the US as I'm assuming, then no, next business day isn't an option. (Unless you get a courier/UPS or FedEx "Same-Day"/etc to pick up your laptop very early in the day and put it on the first flight out from nearby HKG... you might be able to get it late in the evening or the next morning for $1k shipping perhaps.

) Non-custom orders that can ship from the US can be next business day, explaining how some folks have gotten next day shipping.
Assuming these BTOs are indeed coming out of Shenzhen via FedEx, they're quite likely being routed via this flight to Anchorage (which arrives at ANC around 4PM EDT):
http://flightaware.com/live/flight/FDX48
I'm still "Not Yet Shipped." In Massachusetts, placed my order for a 15"/2.66/Hi-Res Antiglare at 7:46PM PDT on Apr 13. Edu discount, if it matters. Still shows an estimated delivery of "Apr 16 - Apr 22"... Wish the status page had an auto-refresh feature!
...at least UPS just showed up with my 2x4GB RAM upgrade.