sounds like you're right about that
 

wikipedia :

Plantains contain more starch and less sugar than dessert bananas and are therefore usually cooked or otherwise processed before being eaten. They are always cooked or fried when eaten green. At this stage, the pulp is hard and the peel often so stiff that it has to be cut with a knife to be removed. Mature plantains can be peeled like typical dessert bananas; the pulp is softer than in immature, green fruit and some of the starch has been converted to sugar. They can be eaten raw, but are not as flavorful in that state as dessert bananas, so are usually cooked. When mature, yellow plantains are fried, they tend to caramelize, turning a golden-brown color. They can also be boiled, baked, microwaved or grilled over charcoal, peeled or still in the peel.