I am certainly not a good programmer, and using this logic, you might hire me. So your list isn't perfect; however, I suspect that it's pretty good. The basic problem is that it won't distinguish between people who are really enthusiastic about computers and genuine good programmers. The difference between these two groups is probably really obvious in a field like chess (lots of people who are enthusiastic about chess are still terrible,) but it might be harder to notice in a knowledge-based field like programming.