Hey Jim, it's interesting that only Marty E responded with a simple 'NO' per your original request for a Yes/No answer. I tried but bit my lip anyway with my initial reply of "Gargraves Rail is too big". Lol!
Truthfully, when Atlas's 20th Century Track System was first introduced it was designed to mate right up with Gargraves so it is 'too big' as well; or as you mentioned in your initial post "Atlas rails are HUGE". Otherwise Atlas is the most prototypical track for us but would have been much more appealing had they used a thin center blade like Super O or MTH ScaleTrax.
I had a nice layout using ScaleTrax and found that our trains appeared to be much more massive because of the visible smaller outside rails and the center blade was significantly less obtrusive. I actually pulled the center rail of a piece of Atlas and replaced it with the MTH blade and it was a huge improvement visually even with the larger oversized Atlas rails.
In hopes of having another layout someday, I have been acquiring a good supply of used Atlas but would welcome a new track with outer rains from Atlas 2 rail and a center blade like Super O or ScaleTrax. Now, how many new people coming in would be aware of and desire more 'scale' looking track is anybody's guess but I certainly would!
Here are some photos of my old layout showing how nice ScaleTrax looks and the effect it creates for enhancing our models. It was very easy to work with as well - very similar to HO flex.
