I also note that most if not all of the proposed metrics measure quantity over quality.

Personally speaking, I expect my programming output is extremely low for professional developers. I take a lot of time to think out code beforehand. I'm driven to produce code which feels like it presents ideal textbook craftsmanship. The solution should be elegant. The code should be internally consistent. Only the very highest tier should express anything like business logic or application-specific behavior. There shouldn't be any crufty special cases. Test cases on each module should be automated and thorough. It's a "Zero Defect" mentality.

But by some people's measure (especially dividing any metric over time), this output really sucks.