Soldato
Problem with BT TV is it uses your Internet connection for non-free view channels. Watch a sky channel, use some of your broadband. Sky is completely independent of BB speeds which is why its been so popular.
I had the same concerns especially coming from virgin 200meg but I've never had an issue with it. BT's fibre is arguably more stable than sky's.
Broadband was my main reason for going with BT and as I said the TV was a suprised of how good it is.
Plus I'm sure I read the sky was looking to going via the streaming route at some point... You have to admit that's the future.