Slashdot, Kotaku, Wired, ComputerWorld and others all claim that they've figured out that Comcast's invisible monthly usage limit is 90GB per month. Unfortunately, they're wrong: the 90GB mark seems to be some fuzzy math based on general numbers thrown out by Comcast representative Charlie Douglas, who has been tasked with damage control by the company.

Douglas tried to get specific without being specific, suggesting the Comcast caps were equal to the consumption of 30,000 songs, 250,000 pictures or 13 million emails in a month. However, we've seen customers warned for consumption as high as 400-500GB per month, and it has been clear for years that this limit varies by market and area congestion.

The irony, of course, is that the neolithic story about Comcast's limits (we've been talking about it for going on half a decade) continues to get traction not because Comcast imposes caps, but because of the way Comcast handles talking about and enforcing the caps (read: inconsistently, vaguely and mysteriously). Daily Tech asked three customer service reps about the caps and had two out of three tell them there was no limits:Of course, Comcast can't offer precise numbers because it varies by region, and won't offer that information for fear heavy users would consume just enough bandwidth to avoid setting off alarms. Although, if Comcast were to impose a clear monthly cap (say above 400GB), you'd probably see interest in this topic die off almost immediately.