rentahoose, could you explain what you find controversial about a system of positive praise and reinforcement?
I find this stance odd. I have a dc at an ABA school. HIghly structured, although seems to spend a lot of her time playing board games at the moment 
I also have dc at mainstream school.
the similarities between the two are greater than many would think.
in the ABA school, the system is more individualised, but the overall goals are the same (encouragement to behave in a socially aware and responisble manner, as befits being in school) as in mainstream. event he systems used are not that different - in the ABA school, the reinforcements come quicker (dc has to work through a set amount of 'tasks' before getting reinforcement - which is playing a board game. at mainstream, my dc have to work through a set amount of work, before being allowed 'golden time' - where they mostly choose to play board games
)
obviously, the curriculum is differentiated at the ABA school, and the staff ratio is much higher. but overall? same system, different school.