[stcredzero]

Actually, it's been known for quite awhile that there's a factor of 2 to 3 times in productivity. That's not really marginal. Talent far outstrips that, though.

[inopinatus]

Indeed talent does. I make no claims about productivity. Your note is intriguing, references invited.

[pessimizer]

productivity != quality and utility

[stcredzero]

It doesn't equal utility, but it does equal quality, at least to the extent that bugs per SLOC matter. This has also been known for awhile, with data to back it up.