Perhaps I'm not understanding you.
Your statement "@ 75 MPH, a hybrid will return no benefit in MPG. Other than that, it will run like a normal car @ normal or worse MPG use." indicates that you don't think a "normal" car (I assume you mean pure ICE, no electric) gets the same performance as a hybrid.
This, of course, is incorrect.
Then you say that you get 64.1 mpg with your HCH and 38 mpg with your Civic EX. Doesn't this mean your HCH gets better mileage than your EX?
I guess I'm not sure what you were initially trying to say.