I hope you don't expect me to have that information, although it's reasonable to assume that if their first attempt was purely javascript based, that they had a certain intellectual investment into the language. I'm not sure what would have been gained by switching to Ruby. PHP is problematic in many ways, not only language but also runtime and lack of asynchronous I/O.
Didn't expect you to have that information, was just more general posturing. I complete agree with you on PHP.
Ruby would have been useful in that it runs very well on the JVM (their product runs Javascript in a JVM container), but is pretty popular amongst web developers (you could also argue, with the right kind of web developers; PHP developers prefer to just use shared hosting in any case).
