You're also leaving out what the household might be doing with its Internet besides Netflix, and you are conveniently ignoring the 150GB cap on DSL service.
Why are you defending AT&T for lowering its level of service by an order of magnitude and imposing gigantic overage fees?
I did some quick math. I could go over this cap on my DSL line simply by using my connection at full speed for LESS than a tenth of a month; i.e., less than 2.4 hrs per day. Sorry, that's not acceptable on an "unlimited" link.