[aarongough]

> Software developers on average write only about ten lines a day

That is far too low of an estimate for any productive programmer. Perhaps when trying to solve some sort of insanely complex bug perhaps?

[CryoLogic]

Depends on the type of software you are writing. If you are hooking up a bunch of libraries you installed with NPM on your node project you will be much more productive than if you are debugging a compiler or working on a hardware level device driver.

[Balgair]

If anything, good programming may result in a negative amount of avg. lines/day.

Depends on job though, of course.