Would you be happier getting upgraded to 10 meg for free and hitting sppeds less than you had on 2 meg because now everyone on you street has been upgraded to 10 meg and are leeching 24/7?
Or would you be happier on your 2 meg, hitting 2 meg speeds even though 1or 2 people on your street are leeching at 10 meg (but pay for it)
I would personally only upgrade to a new product if the network could handle it - Im not disagreeing with that fact that it was a bit silly for ntl to go straight to 10 meg knowing (possibly) that they wouldnt be able to handle it. IMHO, it would have made more sense either to offer something like 5 meg or 6 meg so atleast they could say its nearly as fast as MAXDsl and the network prob would have coped better - or had a longer trail period over a larger userbase? (Im not really sure if this was trialed) to make sure it would all go well.
But I guess it doesnt always work like that in real life and business after all at the end of the day youre there to make profit. Lets wait a bit and see what happens, if nothing does, theres always DSL
P.S. All the stuff above is my opinion on the matter, it may be shockingly factually incorrect, and if it is, please fell free to correct me, Im here to learn

and feel free to disagree with me if you think Im wrong too.