When I started with my T, she had been practicing about that long, though she worked with a grief organization before that, for a number of years. I know skills and experience are important, but I think most important is how the T relates to you. Six years is a long time, to me. Just my opinion. Sometimes newer Ts are less set in their ways and are not burned out! Not that any T should practice if they're burned out, but I wouldn't eliminate a T solely based on their years of experience if everything else sounded good.