Is that true though? Other commenters are arguing that the encryption of that flash chip is a value that, while based on the PIN, is sufficiently long as to resist brute force encryption. Is it possible that you're mistaken?
He's not claiming that you can brute-force the encryption key -- he's proposing another way to brute-force the PIN itself that won't trigger exponential timeouts or auto-wipe of the device. I don't know if he's right or wrong, but let's at least make sure we're clear what his argument is first.
Of course it's possible I'm mistaken. But not because of any of the reasons given here so far.