My son had speech Therapy... from about 19 months old until almost 3 years old.
His Therapist, is also not only educated/knowledgeable in "speech" as a Pathologist, but also in OVERALL child development. My son was given an OVERALL developmental assessment, not just for speech, to see where he was at. Per HIM and his age. I was given a print out of his results... overall. From there, the Therapist knows what to work on, what is lagging or advanced. In interactions with my son, they can know what is lacking or lagging or advanced. Then they work with the child accordingly. It is not a thing where they do that same thing, with each child. It depends on the child's own development and level. My son just needed help with speech... in other areas he was even advanced in development for his age.
My son, even at that young age of when he started, was focused and stayed on task, with the Therapist. But, she said the this is not the usual... most young Toddlers, do not stay focused, much less for the 1 hour session. And many times, she has to try and get the child to pay attention... and even if that means following them around the room as the scamper about not paying attention. The nature of kids.
BUT... the Therapist has a job to do... and each session has a purpose. Thus, they do what they are experienced in and how to handle kids... in light of the goals of the sessions.
You may just want to ask her what she is doing and why. Her methodology. Each Therapist has their own style. My son's Therapist also concentrated on not just getting my son to say things/words... but to feel comfortable with her... and on HOW to form words with his mouth and mouth coordination... and to feel confident in it. Speech Therapy is not just about saying words... but also the Therapist observes the child's speech ability... and their mouth/tongue/throat coordination and how they can/cannot form words... and their expressive language ability etc. It is about the mechanics of saying words, as well as the child's understanding and ability to follow direction etc. OVERALL development.
Your child only had 1 week of therapy. That is not much. It is a process.... and the child does need to be "encouraged."
Many aspects to it.
Kate F. also made very good points.
For your son, there must be a reason for his speech therapy? It is not only about how many words they say or not.
My son LOVED his speech therapist.. and he KNEW it was to help him "talk." He gained a lot from it.... much more than i could have done with just my layman knowledge of it.
all the best,
Susan