At risk of sounding like a sore loser, IQ tests, whether or not they are bias, are not a good indicator of success (in fact, I'd question it's ability to measure "intelligence" or "potential"). Scoring well on an IQ test does not mean you will be successful at your job.

It does not measure your willingness to learn. It does not measure your ability to retain information. It does not measure your reception to criticism. It does not measure your ability to play nice with others. It does not measure your interest in the job. It does not measure your ability to work hard. Among others.

As such, I think giving someone an IQ test at a job interview is a fairly bad idea.

What we should have picked up from Gwen's job interview is that she is willing to learn and work hard given a fair chance.