No truth to it. I get asked by parents all the time what age to start their kids riding. Most of the time the answer is as soon as they want to. For those too young to decide I have seen kids start at 2. They will not be shredding at first but if you start him at 5 he will be killing it by 7 if you wait till he's 7 then all you're doing is robbing him of two years experience. I also recommend a private lesson with an EXPERIENCED instructor. Group lesson are good for social development and progression but not to good for learning properly.