The scrabble linguistic standard

It put me in rather a huff, when Delta read on the cover of the Scrabble box, that "good players will achieve between 300-400 points in a game."

I'll have you know, Mr. Scrabble guy, it's impossible to get 300-400 points when you're playing against Delta, and he doesn't let words like yeti in (especially when it sits on a triple-word-score square). I mean, yeti, for crying out loud. Everyone knows that even if it's not in the dictionary, it's a real word. Right?

Just like bigfoot and sasquatch (although those are immeasurably harder to assemble in scrabble).

Eeks. 300-400 points to be considered a good player?!

Sign me up in remedial courses for the linguistincally inadequate.