Or they tend to just Go. Interestingly, I've read a lot of Go users come from the Ruby and Python communities.
I bet if something like RubyMotion wasn't a commercial product, the reality would be quite different.
Just wait and it will come, it only needs a bit of enterprise architecture caretakers.
JEE might have its flaws, but it is way better than any C or C++ enterprise stack I have used before, definitely better than CORBA for example.
Don't believe what you read, especially when it originates from a biased source.
When i want productivity, i use python.
When i want speed, i use c.
When i want both, i use both.