Speed gain and reliability are totally unrelated to each other, the only thing the speed gain could affect reliability wise is download rates.....
People like a service to be v quick most of the time, most don't actually care if their service is only up 99.5% of the time so long as it's quick to be honest. (Most customer modems I've seen have uptimes in the 99.9% or higher range).
Not entirely sure what your comment means Neil. Although you're probably right, that and price, which will be why Pipex is getting a sweet churn at the moment from people whose special offers on 1Mbit are running out or who want 2Mbit cheaper than the Pipex business service price of over £70 a month
