It very much depends on whether it's new code or maintenance mode as well. I've managed to put out 2kloc of MFC C++ over the past two weeks for an internal test app, but that's very unusual and my maintenance work is more like 100 loc a week.

I think the most extreme of this was a colleague of mine years ago who spent two weeks bug-hunting and eventually removed a single wrong minus sign. Vital work that this metric is completely useless for.