Does the PT instructor usually speak informally?

This is my first time getting personal training, so I don't know anything ( -_・)?

From our first meeting, you said, "Oh, you just need to focus on this," but yesterday was our first class, and you came as if nothing happened. Starting with "You came here like that?", you spoke informally to me until the end of the class.

Do trainers usually speak informally to you during personal training?