I just created an account to complete my purchase and got a "Congratulations! You're Pre-Qualified!" page during checkout. It had the prescreen opt-out notice and apparently would be available for instant use.
Might be a way for some to feel out Barclay before applying -- I got the popup before entering any payment information so it's not necessary to actually intend to complete an order.
I chose "No thanks, continue with checkout", so I can't comment on anything beyond that.
Edited by bostonte, 29 December 2011 - 04:51 PM.