I saw some T rail track and switches for the 1st time this past weekend at the Big E train show.
I know very little about it except for what I read about it this evening on this thread, but my impression of it, when I looked at it closely and held it in my hand, was that it is very high quality track. It makes perfect sense to me that trains run great on it.
Although I can understand how its lack of flexibility could be a disadvantage when building a layout, that could also be a plus to prevent the track from warping. Arnold