one thing you have to remember with streaming the games over the internet is some like me have bandwidth caps that we have to watch. comcast limits me to 250gb per month.
I don't know but I assume charter also has a similar data cap.
We have 3 laptops (2 of them connected to office computers through gotomypc.com for several hours at a time almost every day), Vonage, 3 Dish receivers that occasionally stream VOD, a PS3 and XBOX 360 both used for online gaming and Netflix streaming, 2 iPhones, and a Bluray player that streams Netflix all connected to our home network. We also stream Pandora on my Oknyo AVR pretty often.
Between the hours of 5:30PM and midnight on weekdays and all day on weekends there is almost always someone in the family streaming Netflix. We often have 2 and occasionally 3 devices streaming Netflix HD at the same time.
I have no idea how many GB this adds up to per month but I am pretty confident that our household uses far more bandwidth than the average house. We have never been cutoff or contacted by Charter about excessive bandwidth use. If we are being throttled after we hit our cap they aren't limiting our speed enough that we notice it. If other ISPs handle their data caps similar to the way Charter does I would think the vast majority of MLB.TV subscribers will have no problem. If the other ISPs do something different I strongly suggest switching to Charter if it is available in your area.