As Markus did, I took the so-called "Brainbench PHP 5 certification" yesterday night after some beers. ;) Nevertheless, the result was, that was I still "scored higher than 90% of previous examinees".
I have pretty much the same feeling about this exam that Markus has. I don't really see a point in testing how familiar people are with the docs, but that seems to be the main purpose of the exam.
He also notes that even the examples with code weren't written well, being either too long or using deprecated functions to accomplish the taks.