You'll notice I did say my experience :-) I'm not trying to "win" an argument here, which would require "evidence", just pointing out that there are more important things in language selection than the features/characteristics/quirks of the language itself, especially given there's not much to call between Ruby and Python.

But, y'know, you could try quantifying it if you like, by looking at the libraries available for each language, and looking at how many jobs are "Ruby" as their main skill and how many are "10 years of whatever + Python".