For years, I have been interviewing suppliers of Light-Sport Aircraft about how functional and durable their SLSA are for flight training. Contrary to what many think many SLSA actually make good trainers (see this recent article). Old timers might think you have to stick with Cessna or Piper to have an airframe built robustly enough to handle student flight training. Those who feel that way are behind the times. LSA are here and now in flight schools.
This is a tale, not of two cities, but of two coasts, the Pacific and Atlantic yet the story is unfolding in several other locations, too.
Based on multiple flight schools deep into using LSA (as portrayed in the linked article above), current LSA appear more than up to the job. That has been ongoing for some time. The new development that is popping up on the coasts and elsewhere in between are entirely new flight schools, ones organized completely around Light-Sport Aircraft as primary trainers.