I think if you do a search (bottom of the page) there will be many threads on this - maybe some actually speak to the Thermador. But from what I gather, its more related to the cookware you use than to the cooktop itself. That is discussed at length in the earlier threads as well.

The following thread should be helpful - especially the 1st, 3rd and 4th thread.

Here is a link that might be useful: Threads on induction