This is my personal take on what counts as a real buddhist school.
A real buddhist school will emphasise the importance of regular sincere daily meditation/zazen.
it wil not promise that with very little effort you will be magically gain deep wisdom/understanding/enlightenment in a short space of time but instead assure you that it takes a lot of discipline and patience to sincerely practice buddhism.
it will emphasise the importance of conducting yourself in person in a courteous and respectful manner to everyone you meet and just generally not to be a dick to people.
it will emphaise the importance of a healthy diet and lifestyle.
as far as metaphysics goes; well that's where no one can ever seem to agree on much but that's probably for a different post.
so is this a reasonable definition of what counts as a real buddhist school?
have i left out any glaringly obvious bits? anyone?