Thanks for doing these extensive benchmarking tests. It would be really helpful to see a more complex example that includes user authentication. Aside from the benchmarks it's also a really good starting point to compare the code in different languages and get a first impression of a framework.

On a side-note, I'd really like to know why so few start-ups seem to be using Spring. It could be just a wrong impression . But from what I have seen most start-ups use RoR or Django. My guess is that Spring is less flexible and less known outside big companies, where it is usually the default. It could also be that Spring works better with the waterfall model whereas Django or RoR are better suited for explorative programming and that fits the respective spheres better.