I have a lot of experience hiring programmers, and to me the salary range for programmers appears to be much larger than this article states. Specifically this

I have a lot of experience hiring programmers, and to me the salary range for programmers appears to be much larger than this article states. Specifically this: "Here are some things you can point out to your employer to help make your case that you are worth 2x or 3x what they are paying other programmers, but you'll be lucky to be paid 25% more. If you are 10x as productive as other programmers, you'll probably be paid no more than 2x their salary." seems incorrect when compared against my data. Obviously if you look at total compensation there is more than a 10X difference between groups of programmers in many cases, but even just considering salary I have seen a pretty large dynamic range. For example, many large software companies (that I compete with when hiring engineers) pay their experienced engineers 3-4X+ salary compared to someone they might hire straight out of university. The best methods of measuring productivity or value of an engineer are certainly worth debating, but the idea that the range of salary is something like 2X doesn't hold up for me.