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).

But you aren't on the net 24/7. You have to sleep and poop and some point

Comcast To Amend Acceptable Use Policy
 
Friday, August 29, 2008

Today we will announce we are making some changes to our “Acceptable Use Policy."  We have this policy in place so that we can maintain a consistently good high-speed Internet experience for our customers.  The policy contains rules on everything from spam to security and data usage.

We’ve taken several steps to clarify our Acceptable Use Policy for our customers. In January, we added new frequently asked questions about what we consider acceptable use of our service to the “Help” section of Comcast.net, www.comcast.net/help and the Security Channel pages on Comcast.net www.comcast.net/security.

Since that time, we’ve also listened to feedback from some of our customers who asked that we amend our policy on the limits we have in place for data usage – otherwise known as “excessive use.”  Excessive use means bandwidth or data usage that is significantly higher than typical residential usage. Excessive use is very atypical – less than 1% of our customers today use an excessive amount of data.  They use so much data that the usage could negatively impact the online service for other customers.

Beginning on October 1, 2008, we will amend our Acceptable Use Policy by establishing a specific monthly data usage threshold of 250 GB/month per account for all residential customers.  A preview of that policy is available in PDF format at www.comcast.net/networkmanagement.

What Does 250 GB/Month Look Like?
250 GB per month is a large amount of bandwidth or data use, much more than a typical residential customer uses.  Currently, our residential customers use approximately 2 to 3 GB a month.  To put 250 GB of use in perspective, a customer would have to do any one of the following in a given month:

    *     Send 50 million emails (at 0.05 KB/email)
    *     Download 62,500 songs (at 4 MB/song)
    *     Download 125 standard-definition movies (at 2 GB/movie)
    *     Upload 25,000 hi-resolution digital photos (at 10 MB/photo)

Proactively Notifying Customers About Excessive Usage
As part of our pre-existing policy, we will continue to contact the heaviest users of our high-speed Internet service and ask them to curb their usage.  This is the same system we have in place today.  The only difference is that we will now provide a limit.  If a customer uses more than 250 GB in a given month 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 they had used in the previous month and ask them to curb their usage.  We know from experience the vast majority of customers we ask to curb usage do so voluntarily.

Communicating The Policy To Customers
We are taking a number of steps to notify our customers about this change.  We have posted a preview of the amended AUP on our Network Management page as well as provided an overview and a link to some FAQs.   We are also running banners on our Comcast.net portal as well as on our Security Channel Web page directing customers to the Network Management Web page.  In addition, we will be sending customers a bill stuffer notification that the amended AUP will officially go into effect on October 1st.
If you have any questions regarding this policy please refer to our FAQs, or speak with your manager.

Thank you in advance for your help in educating customers on this policy and listening and answering their questions.