My LBS ordered it for me from TREK, I think this is where they ordered it. It's actually in the MTN bike section.
As far as road bike with flat bar...some shades of gray there for comparison. I think the FX frames are more "relaxed", not sure what that means. Other than that, yes I would agree they are flat bar road bikes, which suits me perfectly.
I did not shift the shifters down. Both are equal size and I can read the indicators fine. You might be seeing some distortion in the camera angle.
Can't answer your question on the price delta for the 660's. I will say this. I know a few employees at the LBS were kind of blown away (in a good way) when they saw those shifters on a "hybrid".