Paddy - You are correct, but this is not a matter of disagreement. What you have shown is that the word "prolific", like most English words, has more than one definition or function. The definition and example I gave is the one most commonly used in the U.S. You're example is accurate, but not as common. Perhaps in GB or Australia it is more commonly used in your context. Either way, it's good that Young now has both.
