Is Groovy really groovy?

Parker Lewis writes: In the current days it's possible find a lot of marketing about the new blessed Java language: Groovy. I was searching more details about it, and I find this article. Steve, the author (and currently a Google employee), developed a little game (Sokoban), using all utilizable languages running over the Java Virtual Machine. The impressions about Groovy was not very good. The complete set of articles can be read here.