I went on an introductory flight last Monday (6 April) with an instructor who had around 900 hours.
First flight ever?
His opinion was that I did well for someone with zero time (could've been his attempt at a selling point).
I'm glad you are thinking like this. At least you see that it is a BUSINESS.
But he was very thorough, knowledgeable, and definitely someone who I'd love to be a student of.
This type of thought process always concerns me though.
What other examples of flight instructors have you encountered.
Was this Intro flight your first flight?
What criteria are you using to make a determination if this instructor was knowledgable or not and that you want him to be your instructor?
Just slow down a little and look around.
Maybe even take another Intro flight at another flight school in the area to get at least ONE data point for comparison.