D - While the information (truthfully and honestly) conveyed on this site is important to those of us contributing, it is equally as important to recognize comments that are meant to be humorous, even when laced with a little sarcasm.
While your question was directed at me, WB decided to make a joke before I saw your question. If you felt his attempt was lame, so be it (personally, I got a little chuckle out of it). Please don't take it either seriously or personally. Recognize it for what it is. Flaming each other here is neither productive nor enjoyable.
To answer your question, usual is 40, exceptional is 60. Again, this is totally legit, no other acronyms apply here.
WB - I might enjoy hearing some of aht you don't say ....