Thanks for the reply IAH. I happen to be very happy with the Edge. It's probably one of the nicest rental cars I've ever gotten without having to shell out for a specific model. As luck would have it, my girlfriend ended up filling it after shopping today, so good thing I ended up with the SUV.
I can say for certain it was not because of the rate I paid (I'll leave it at that). Good to know about Standards having few models. When I booked, the rates between economy/compact/standard was only a dollar or two, so I might book a standard next time as well and hope for the best. :-)
-baseline