So, on the basis of once having taken an IQ test that you found not problematic and after which they hired you, you feel good about them. That's great. Sample size of 1, obviously it must be unquestionably a good thing.

If developers aren't evaluated as people, but as units who are expected to hit some threshold of "intelligence," then that says something about the company asking you to take the test.

If everybody who tested well included everybody who was intelligent, or able to code well, you might be able to use it as a proxy. If not, you're missing out as a company.

The students who achieve the highest grades in school aren't those at the peak of the IQ range - they're the ones who actually have to put in the study time to learn the material, rather than cruising on previous knowledge. Do you want the person whose IQ score is better, or do you want the one who will do the work? If you want the better IQ score, what will you do to get them to perform when asked to do what might be regarded as drudgery?

Or are you saying that they give IQ tests to screen out the really bright bulbs, so as to isolate those who are willing to slog through whatever they're given?