Here's my totals for August. It's really not even close to the 250GB.
They don't say they are going to charge $15 for 10 gigs; that was apparently brought up as a possibility, but was not committed to.
From my rough calculations, to get to 250GB in a 30 day period, you would have to average 96.45 KB/s every second of every minute of every day of that period. (250,000,000,000 bytes / 30 days / 24 hours / 60 mins / 60 secs = 96,450 bytes/sec). From the Consumerist article, uploads do not count so it's only downloads they are looking at.
This is also not changing anything that isn't already being done, they are just defining where the cap exists.
This is the same system we have in place today. The only difference is that we will now provide a limit by which a customer may be contacted. As part of our pre-existing policy, we will continue to contact the top users of our high-speed Internet service and ask them to curb their usage. If a customer uses more than 250 GB and is one of the top users of our service, he or she may be contacted by Comcast to notify them of excessive use. At that time, we'll tell them exactly how much data per month they had used. We know from experience the vast majority of customers we ask to curb usage do so voluntarily.
Overall, I don't think this will be anything any of us have to worry about. There was one commenter on the Consumerist page that said he used 4TB a month (!) but he's obviously an outlier.
