The 10 LOC/day includes the entire project, including analysis, requirements, design, documentation (user and tech), test, management etc, in a large project. Saying (as many do) that an individual programmer has produced hundreds of LOC per day is to miss the point.
You have to start by defining your terms of reference and make sure you are comparing like with like.
You have to start by defining your terms of reference and make sure you are comparing like with like.