Absolutely. I enjoy it so much that I wonder "do people actually NOT enjoy writing Ruby?" It's usually the first tool I pull out of the toolbox for DSLs, scripts, spikes, one-offs and the like. A lot of the time, the project will happily stay in Ruby unless there's a good reason to use something else. And then I move it - horses for courses.
I programmed professionally in C, C++, C#, Deplhi, and a few other languages well before I had even heard of Ruby.
You have to be careful of what you mean by "does it actually work".
Does the dowsing find water hidden in a random spot or is the dowser tapping into subconscious knowledge about the land to find it. The parent is talking about the latter.
Look up "Ideomotor phenomenon" in your source. It's right above the pseudoscience bit.
I programmed professionally in C, C++, C#, Deplhi, and a few other languages well before I had even heard of Ruby.