Hahaha :)
Re: copying... I'm not sure that there's really a necessary distinction between copying input and simply being able to type fast. In this scenario, yes, you're simply copying input; for that reason I added a 800 ms delay to allow the brain to process the word before the variable timer is enabled, so ultimately what's being tested is your ability to write what is in your brain already.
That said, I do acknowledge that WPM is not necessarily the best gauge of efficiency. I'm a programmer, and I'm not sure exactly how WPM relates to my work (I'd be curious to see a study) since much of what I type is "nonsense" words to begin with, and WPM is largely a function of your ability to habitually reproduce the same character sets (aka, common words in your given language).