Gail Ross is a reputable agent based in Washington, D.C. She's very unlikely to drop a client with a book sale based on this kind of thing, however.

Publishers are (for good reasons, at least from my point of view as a publishing professional) pretty careful about revealing who the acquisitions editors are on particular books. I'd go directly to Brian Tart, whose the person whose line is at stake if this becomes an embarrassing controversy.

I completely agree with the points about what to emphasize and what to downplay. However, the business about having to explain the difference between mean and median to them is extremely useful.