I canceled Sky Sports service recently when I found out there was no EPL (sorry - have to admit being a hard nut fan) and I also canceled the HD $10 subscription at the same time. The sky representative tried to talk me out of this saying that I'd notice a lower quality for all the other HD channels, and she rattled off a few including Channel 1. Truth is I can't say now looking at them that I notice any difference. So now I'm starting to wonder whether (as someone else in the thread mentioned), there's something that needed to be calibrated in my TV too perhaps to reap the benefit of a HD stream, and that maybe all that time I was paying for a service that I never got any benefit out of???
When you cancel the HD ticket FTA channels (1,2,3) still remain in HD through your sky box hence the reason you probably didn't notice the difference on those channels.
I did some comparing of the NFL at 4.5Mb vs the premier league pass sample and the NFL does look HEAPS better but maybe that's just the EPL sample that's rubbish and the actual games will be better quality?