The Wikipedia article is lengthy and detailed. A lot of info there. I would be cautious about anything that sounds truly definitive on the topic of cigars. As you know, opinions vary widely on most aspects of cigars--witness this forum. And anyone can edit a Wikipedia article, inserting his or her own favorite interpretation. (e.g. Stating that cigar binders are made from ligero leaf is clearly an odd stance.)
But it's a good read.