Considering the amount of threads on here about commencing training and that is given as the main piece of advice- I guess there would be a lot of potential students rejecting schools based on the requirement for an upfront payment.
I haven't really posted on these forums but I did do a lot of digging through previous posts and all the advice helped me greatly. What I read here did convince me to stay away from particular places that I had initially been considering. So I guess I'm an example of one less student doing training requiring upfront payments due to advice on this forum.