Fair enough - I accept dynamic languages are not always suited to larger projects, particularly with a large number of developers involved all working on the same code. I suppose it is possible to impose structure in a dynamic language by having strict rules about interfaces and documentation, but at some point (which you have obviously experienced) it becomes much more attractive to have the compiler do it for you.

For smaller projects however, with smaller teams, dynamic languages do have less overhead, which is perhaps why they are so popular for web apps.