Well, I was in DBT group therapy for a year or so ~ and it did help me to see the world a little differently. Like Forgive77 said, it isn't an overnight process. There are 4 segments of DBT: Emotion Regulation, Core Mindfulness, Interpersonal Effectiveness, and Distress Tolerance. Core Mindfulness is gone over in between each of the other segments, because it is a key ingredient in making it through life more easily.

http://www.dbtselfhelp.com/html/connecting_skills.html

Regarding my individual therapist, he isn't any one structure. He uses a variety of techniques, which has been helpful for me. The part that really clicked me with him was his validating my emotions and memories. (All of my previous T's made the mistake of telling me that my self-hate was unfair. I shouldn't have felt that way, etc.) So, this T accepting my self-hate was vital to me!

Not that he agrees that my emotions are "right". But he allows me to feel however & points out good things that he sees in me (occasionally). Just little reminders that I'm not entirely evil, I assume to get me stop with my extreme views.

That's my personal experience.

Very best wishes to you ~ I hope that you and your T are able to build a safe relationship. One which validates your feelings, but also challenges your viewpoint.