I'm not sure I understand what you did. Did you only send an "introduction"--even though it's not really an introduction, but rather a riff about your writing style, experiences, and motivation for writing the book which the agent or publisher has yet to see?.
I see I wasn't at all clear. In my head it made perfect sense, but I left out a few key points in my effort to get straight to my question! I sent the publisher a query (which included reasons why there was nothing like this out there, what
was already out there, who my market would be), a separate bio, which detailed my credentials for this subject matter, a Table of Contents, the introduction
and the first chapter. The introduction (4pgs) was supposed to be exactly that - including an entree to the topic, a story that illustrated how I came to this point, which also illustrated to the reader (one hopes) my qualifications and a sort of summary paragraph that led into the first chapter (14pgs).
If you are still with me at this stage, a further comment from you would be much appreciated!