You have to remember that this was only :16 seconds of the 2:00-2:30 minute trailer. And, to be frank, there's going to be lots of Jacob/Taylor, because it's New Moon. Edward's not going to be the main focal point of the story, because he's not there (but, we will just have to see with the "ghost Edwards").
Okay, so my opinion on the sneak peek is that it was cute, showing a little bit of how they are going to portray the Jacob/Bella relationship. I have to admit, Kristin seems to be more comfortable in the role of Bella this time around. And when Taylor said "I'm not going to hurt you", and Kristin looked at the ground, it made me emphatic towards her.
Overall, I'm pleased with it, granted it was just a taste of the New Moon trailer. So, I'll be anxiously awaiting the full thing!