This article is about the worst example I have ever seen of irresponsible writing. This is the kind of thing that gets people and their horses injured or worse! And when we say "you can't believe everything you read on the internet THIS is the kind of thing we are referring to"!!! If I wasn't so angry I would be really sad.
I agree. Stuff like what was in the OP is what gives this forum its bad name for "being full of stupid". I talk to several Mini breeders / trainers and that is all they have to say about it. Which really is kind of sad. There is some really good info here, you just have to weed out the junk.
Back on topic, the link in the OP made me lol. If only training them to a cart was that easy. I am new to driving, and even I could tell that who ever wrote that didn't know what they where talking about. I mean seriously, who would work on getting them used to the cart BEFORE the harness? Then there was absolutely no mention of long lining (not lunging). From what I am seeing of the cart training that is a major part.