Admittedly, the number was a piece of hyperbole. No one posts a 15000 word post. That said I do think at times I've gone less than a week without posting and been at least 15000 words behind. You have to keep in mind other player's possible reactions, and give them their chance.

Many good, hard to argue w/ comments. But I come from a tabletop background, not a collaborative storytelling one.