Fuel efficiency paradigm shift documented in Prius c review

I know that the Prius c has it's own forum, but there has been much discussion over the years in this forum with Ken and Bob essentially arguing that 60 mpg at 60 mph is as good as a Gen II will ever accomplish.

Well Danny's review of the Prius c states :

Now a formal proof of average speed such as that obtained by smartphone accelerometers is lacking, but for anyone who has sustained such speeds at a highway for a decent distance on a Gen II-even with optimal temperature, wind, elevation, traffic and tire pressure conditions- such a result is otherworldly.

Simply put these findings, if formally confirmed, will contradict a few theories and represent a paradigm shift for the Prius family of cars, let alone for the short 46 mpg highway rated Prius C.

 

Firstly, the discussions with Bob's graphs about estimated mpg with increasing speed, Ken's post about the Gen II and Gen III FE graphs, Hobbit's sweet spot, Wayne's hypermiling all took place in this forum.

Secondly, most people who know anything about hypermiling frequent this forum so I wanted to get their reaction.

Finally, I'm still driving a Gen II and look at the reported FE gains of teh c with curiosity that I thought some here would share.