Many mediators say that they use a toolbox approach. I'm committed to the transformative approach. I have many conversations with mediators in which they share their preference for using a variety of approaches and where they suggest that all mediators generally have the same goals. A typical such conversation appears here in the latest blog post.
If you can make it to the Netherlands in June, you should. Among other reasons, you can attend a major conference on transformative mediation that will include Joe Folger, co-author of The Promise of Mediation. Read more about the conference here.