At the end of day, you seem to miss my point altogether. Testing for the skill is not useful in itself. It is just an heuristic.
The industry is choke full with people that seem fairly competent and accomplished, who is able to produce code that fulfills the specification, but who also come with a collection of vices, bad practices, and simply cannot make trade-offs intelligently.
People like me wants to believe that, because CS foundations are not strictly needed for the task at hand, these people tend to ignore it for the same reason that they ignore other, more important, stuff that also is not strictly needed to complete the task at hand (but that will have a direct impact on the quality of your solution).
I am fully aware that there are great developers that do not come from a CS background. I am also painfully aware that there's people who excels at the CS 101 questions but cannot perform in a real world environment. At the end of day, this does not provide a final go or no go answer. It is just an indicator of whom you want to bring in for a deeper, longer interview.
> hope you're not trying to put those words in my mouth!
Not at all. I was just going on with the troll thing. Hope I did not offend you.