AAF is not calling itself a HSR line, with reason. Review their web site:

[www.allaboardflorida.com]

With the distance and expected schedules, they can do the job with normal Amtrak-style equipment running at track speed of 90-100 (normal Amtrak equipment is designed for at least 110). Well within the boundaries of conventional passenger rail - "HSR" would be a bit of a stretch. Will certainly require upgrades on the FEC line, which it will use, but not much beyond normal conditions for a true main line - say Class 5 or maybe 6 with PTC/ATC - and FEC is a well-built line to start with. In all, a well-costed-out, doable service especially if they get the needed loan guarantee for capital and startup, and the state/airport help for building a terminal. The 3-hour target schedule is competitive with drive time on the Turnpike (95 takes a bit longer due to traffic) Miami-Orlando; minimizing stops (only 2 intermediate stations according to their web site) is a key part of it.

I wish them well. They do seem to be making progress - doesn't look for now like another Marlboro Train. The fact that it's part of the railroad company helps (compared to LV service on UP...).