Rented off Netflix/Watching Season I right now..
I had forgotten about this show until a couple of days ago, even though I actually have a couple of episodes recorded on VHS.
The writing on this is amazingly good for a low budget series. I laughed out loud more than a few times. For a kid's show, it has a fair amount of "adult" humor, just little things that an adult would catch.
According to the extras, Tiffany's mom was always trying to get them to allow Tiffany to use a more natural tone. However, the producers said no. However, that didn't stop her, and if you listen carefully, there was a couple of times that she dropped in a normal tone. It's subtle but it's there. You can also see just a little bit of Tiffany's true personality in Vici.
http://www.youtube.com/watch?v=3_x7WHE9qQY