I tried to post a comment at your blog but could not get past the captcha. So here's my comment:
Yay! Thanks, I enjoyed that.
I loved this story and always felt that it was different from the others, somehow. I never really thought about why though. I think the lack of moral is an important reason, and the fact that the littlest gets the better of the bigger troll, but is also backed up by his bigger brother.
So you sort of get to have your cake and eat it. As a child, you get to outfox the big guys who control your life, and you also get to have a big guy look after you.
Now I'm thinking of all those other stories I loved. Like the one about the wolf and the seven goats...also about a little goat who tricked a big monster, but gets help from mom in the end.