I'm not surprised actually.
Knowing how bad off I was, I was prepared for it to be a while. My H came to a session tho and accused her of seeing me just to earn more money. (totally untrue and says more about H than about T.) She explained that in her experience, people with my combination of issues and the length of time I was self-"medicating" with an eating disorder (>30 yrs) typically needed T for 3 to 5 years before they saw significant improvement.
So I'm really proud that I've made tremendous progress since I started in Jan 2011. In fact, she thought our two year anniversary was our three year.