Actually, here are a few interesting points from the RoR project page.
1. DHH seems to have written (or at least checked in) about 65% of the
2. Ohloh estimates that RoR should require about 18 man-years of effort
So lets be conservative here and assume that DHH is responsible for 50%
of the effort on rails.
This means he personally has generated 9 man-years worth of code in the
two years since the repository was created.
So somehow one person has managed to do the work of 4-5 coders in a
single year. Do you suspect that might be because he drinks too much
coffee or because he uses Ruby?
Note: Even if these numbers are off by a bit, he's been very productive
compared to whatever standard they are using for determining how many
LOC can be produced in one man-year.