Hmm, I believe I've seen shades of this idea in Selenium's most basic test script format [1]. It isn't a decision table, per se, but it was designed to be as easy as possible for non-programmers to adjust. That said, I don't think table-driven programming is as widely useful as this author claims. Most of the testing engineers I know immediately moved away from Selenium script tables toward higher level constructs in JavaScript or Python. I don't think a table is great for expressing recursion or iteration.

[1] http://seleniumhq.org/docs/02_selenium_ide.html#test-suites