As it turns out, my assertion that the level of roast applied to the particular competition Muzha TGY mentioned in this post was unusually high was a bit misguided. In fact, the amount of roasting on this tea is more or less typical for an awarded example, it's just that roasted teas in general are not awarded quite so often. I've changed a couple of lines in the original article and added an addendum for the sake of accuracy.
If you're not too interested in the relative popularity of tea genres or associated bias in a competition environment, then I apologise for having wasted your time. Please accept this picture of a leaf in some water as compensation: