I think everyone can agree that 0 comments can generally be considered sub-documented code. Remember that even the most self documenting code can only ever document what's there; never what was intentionally left out, optimized away, tried and discarded, etc. You'll always have some need for English, basically, in your source files, or you're bound to leave out important caveats and design decisions.
I'm interested in how these sound principals you guys are advocating (with which I'm in full agreement so far) translate into code statistics. In particular, what open source projects are considered to be well (not over-) documented, and what's the comment ratio there.
