Not Scrod (duh) but there's nothing that really sets them apart. The level of craftsmanship has definitely improved with the newer frames and with the higher prices you do get good quality named brand components along with the frame, but for the most part it's supply and demand. People are willing to pay $2k+ for a Low frame so he's going to charge $2k+. I still find it pretty ridiculous however that there's a charge of an extra $400 to just effectively not paint the frame.

(They do look super nice though and offer +10 fixie street cred)