[fencepost]

Yes regarding the available speed, but on a consumer connection with Comcast at least if you push 30MBit for 3 days straight you may get a call or at least may start seeing popups in your browser on any http (not https) traffic.

From Comcast: The Terabyte Internet Data Usage Plan is a new data usage plan for XFINITY Internet service that provides you with a terabyte (1 TB or 1024 GB) of Internet data usage each month as part of your monthly service. If you choose to use more than 1 TB in a month, we will automatically add blocks of 50 GB to your account for an additional fee of $10 each. Your charges, however, will not exceed $200 each month, no matter how much you use. And, we're offering you two courtesy months, so you will not be billed the first two times you exceed a terabyte.

Also, All customers in locations with an Internet Data Usage Plan receive a terabyte per month, regardless of their Internet tier of service. and The data usage plan does not currently apply to XFINITY Internet customers on our Gigabit Pro tier of service. The plan also does not apply to Business Internet customers, customers on Bulk Internet agreements, and customers with Prepaid Internet.