Why would Stonhenge have more credibility than Brainbench?
The latter seems to be a legitimate company, whose focus happens
to be certification. If you mean because more people in the
Perl community have heard of Stonehenge than Brainbench,
you miss the point of certifications: being able to
demonstrate your technical ability to non-technical people,
via a standardized objective, third-party test. Not trying
to knock either company (I happen to think pretty highly
of them both), just pointing out that one having
more "credibility" than the other is a silly statement.