First, here's our performance:
Next, here's Rails' performance:
As you can see, we're horrible! Our best is about a 3:1 ratio between code and tests, which rapidly deteriorates.
Rails does much better, starting at around 4:1 and working upwards to better than 3:1.
While lines of code vs lines of test doesn't tell you anything about how well your tests are covered, having a 3:1 ratio is much better than having a 12:1 ratio.
Now I just need to finish hooking this in to the SVN commit hooks to have updated graphs.
Later I'll probably release my analysis scripts, they're really useful, and currently work with both svnlook and svn (and hopefully, soon p4 thanks to zenspider).