You know, you are right, Lope de Vega should be way more well known than he is. But Calderon should be even more popular than that. Those two are both near Shakespeare's level but they get snubbed for being Spanish. Meanwhile, Cervantes writes Don Quixote and has no such problem. Explain that? Lope de Vega and Calderon are as ignored as Jean Racine, which is weird because we don't tend to snub the French tradition the same way.
I also have to commend you for cutting to the heart of the facebook/twitter issue earlier when you said that short stories didn't kill the novel or lessen it's popularity. They just added a new layer to the conversation.