Simple & straightforward example. Nice. I may use it to explain the concept in the future.

I don’t think the criticism of the rspec book example is fair though: it’s a code example in a book designed to teach BDD, not patterns. Plus that specific example is so simplistic it doesn’t benefit from the change - especially since the abstraction has only one implemention. I would say your version of the rspec books code is over abstracted prematurely and makes the code worse.