There will always be type rating students failing a skill test. Also those going through the Dan Fly course. What you should know is that the course offered by Dan Fly is a relatively short course:
Without MCC:
8 hrs Cockpit System Simulator
34 hrs Full Flight Simulator (including 2 hrs skill test)
With MCC:
44 hrs Full Flight Simulator
In general I am of the opinion (others are not I guess) that you need a certain level of experience as a pilot to attend a course like this, and, during the course, be able to reach a level of proficiency required of a B737 pilot. I have said something about this on another thread here on pprune:
http://pprune.org/forums/showthread....5&pagenumber=2