The origin of the term "WolfSpeak" originated from the game of WolfQuest, the chat filter being so picky that extreme and often normally unused words had to replace simple phrases. The meaning of the name is really just another way of describing the way for writing in the style some people grew accustomed to on WolfQuest, "WolfSpeak" of course is simply "WolfQuest-Speak" shortened.
Now on to your example post. In no way would I consider that "WolfSpeaking," but more towards a literate paragraph RP post. Here's what I've seen described more often as "WolfSpeaking;"
<NameTag> The chocolate fae leaned on back on her columns, swishing her banner against the brute's forehead. She huffed, closing her opticals and turning her cranium towards the baby blue sky. The fae raked her daggers against the tectonics, showing her pearl blades as she drummed a warning at the brute.
I apologize for the bad example v.v (darn my grammar instincts! XD) Anyhoo, WolfSpeaking isn't so much using advanced grammar as it is using incorrect grammar. Banner is often used to in place of tail, cranium for head, daggers for claws/nails and fae/brute for female/male characters. I'm sure there are many other words used, but those are the first which come to mind. Now let's say the first time, it was with a wolf character. If I saw a lion use the same paragraph, I wouldn't think it was weird at all to call them a wolf-speaker. (Just my way of thinking)
That last paragraph is basically the idea of the whole post, summed up, right there. I believe the reason it isn't called English is either because it is not proper English, or because the name from WolfQuest just stuck. The last few scentances need no comment, and so I'll leave it at that.
~End Rant~