I think something like this
http://hashcat.net/wiki/mask_attack would be more reasonable/realistic. It used to take me 6 hours to brute force a WPA PSK of 8 digits, now I can do it in under 30 minutes.
Let's quote from the page you're linking to:
In Mask attack we know about humans and how they design passwords.Mask attack is NO BETTER than a traditional brute-force attack. You're breaking your own (I sure hope so) WPA key faster only because it's a shitty key.
Attempting to break a sufficiently random passphrase, like RU8wNkg4R2uTQ0tAx will only mean that you'll have to try most of the possible passphrase-space.
I regret to say, the example you posted (breaking a dictionary-based WPA passphrase) is completely orthogonal to bitcoin mining.
