Nolan's direction turned Bale's WONDERFUL acting in that test into a cancer-striken, word-eating hooligan.
I guess he does deserve all that directing cred people give him, because that seems fucking impossible.
EDIT: I misheard Nolan's attribution of Bale's two voices as "we" rather than "he", so I posted a petty, unfounded rant about him being a talent-less hack here. Despite it being funny, I regret doing so in err.
Now back to blasting Nolan for things he's actually done, like the third act of TDK and TDKR as a whole. Oh, and managing to completely butt-fuck Bane because Tom Hardy got bored of being in horrible rom-coms and wanted to be in a train-wreck of a Nolan joint.