I think a case could be made that Amtrak's experimentation could be likened to the "premium" serices like B&O's TimeSaver and Sentinel, PRR's Keystone and NYC's Pacemaker that were tried out back around 1950. These services were advertised as a cut above regular LCL from the beginning, but for whatever reason, it never seemed to have much success in establishing an identity of its own. C&O tried offering an early version of RoadRailer handled in some passenger moves back in the late 50's, and Rio Grande and Consolidated Freightways tried offering overnight Plan I TOFC in a last-ditch attempt to save its Denver-Salt Lake City Prospector in the early 60's.
But for whatever reason(s), the services mentioned never succedded in differentiating themselves to a degree necessary to justify the cost of special handling.
What a revoltin' development this is! (William Bendix)