You have a point but check these out.
http://www.topspeed.com/motorcycles/mot ... 71139.html
http://www.motorcycle.com/specs/yamaha/ ... r/250.html
You are right they could just be lying or trying to sell their product or getting a small fraction of money from Yamaha...however I am going to take the MSF next friday-sunday and hopefully get on one to try it out for myself. Ill also ask the instructors about it.