SnowballIan Royal People have gone into a fair bit of detail using examples of why McAnuff is "extra good". They just haven't used numbers collated from any official source to justify it.
They haven't. They've just said, "He's extra good." Just not in terms of goals or assists... just "something ethereal".
That's because they're entertained by him. Proffessional football is, after all, entertainment for the masses. Which is why they think McAnuff is a good player, he's entertaining. Also his corners (or the 30% that pass the first man) can cause mayhem

I like him personally.