TER is not the review site of choice in all areas.  I'm on the west coast and if you notice, my reviews here dropped off nearly a year ago.  They pick up again on another site.

The purpose of the reviews isn't just to know who is legit, it's so you can get an idea of what a session would be like before spending valuable time and money.  

If current info on a provider is important to you, check her website and see what links she has.  If she has reviews on multiple sites, she probably has links to those sites.  Failing that, you could send an introductory email asking where to find her most current reviews.

Preferred 411 does verify providers who wish to sign up with them. I signed up before I became involved with the TER community and I had to have 3 very well established providers vouch for me that I was legit. They also had to have been providers who worked with me. It was a tough process as they really wanted reviews to verify me but in the end it worked out.

Hope that the insight helps you make an informed decision as to if they are "safe" for you.