Eigen, thanks for the advice. I would feel a bit bad about leaving, but maybe not too bad considering I would most likely not be leaving for another grad school. If I do leave I would be going out to get a real job in industry with the possibility of returning to grad school later after getting some real world experience.
Is this true even in situations where you were admitted by a specific professor to his research group? That's the situation I'm in and it's looking like this group is not a good fit for me. However, it kind of seems like I was accepted with the understanding that I would come and write a thesis and get a PhD. My question is does one have an obligation to follow through on the PhD program once you've been accepted and funded by your advisor?