Someone used this as a counter argument to Bitcoins security on encrypted wallets.

http://forums.udacity.com/questions/6016855/hashing-passwords-using-sha256-is-not-enough-today

How does this apply to bitcoin (besides using ASICs for hashing) and does his argument hold any merit? I'm ignorant as to how Bitcoin Core encrypts wallets to prevent unauthorized usage so can someone please enlighten me?