Yep, Comcast has a 250 GB cap. It’s not great but could be worse.
I’m on AT&T DSL and our cap has just been implemented at only 150 GB. AT&T Uverse is supposed to have a 250 GB cap but I don’t want to switch to Uverse internet unless they will waive the modem/gateway fee and the one-time connection fee of nearly $150.
I didn't know either until I read this thread and looked into it. I've always left my wife's TVoIP console turned on 24/7 and simply turned off the TV when she wasn't watching it. Never an issue when we had Time Warner. Now I'm going to turn it to standby (in addition to turning the TV off) when it's not being used and see if this decreases bandwidth usage.