I haven't done any reading on this, so you are probably further ahead than I would ever be...but I'd think that if you are paying for the session and considering "hiring them" as your T, you have every right to get a feel for how they react/respond to your issues. I would even go as far as to say that this is more about how you feel about them.

I didn't go through any real process when selecting my T....A friend of mine recommended him. I used him for marriage counseling for a few sessions....discontinued at his recommendation for my husband to seek psychiatric care as well as individual counseling....and then about 6 months later, I reached out to our marriage counselor, desperate for help with my declining marriage/situation....and he ended up becoming my individual T.