My broadband with Sky was activated on Thurs. Can't complain aabout them at all. I'm paying £5 a month for the service (saving about £15 a month) and at the moment I'm getting the same speeds as I was getting with me previous ISP.
I signed up to the service that gives you 8Mb max, as Sky said they didn't think my line would take the 16Mb service. Was advised to go for the cheaper option, see what speeds/usage I get, and then upgrade if necessary (they charge you to downgrade within 1st year, but not to upgarde).
Looking at the forums on ADSL Guide have seen people who have a similar setup to me (ie their ADSL/router connected to an extention socket rather than master) who have noticed improvement in speed by connecting to the Master, so will try that tonight.
All in all though, so far can't complain about Sky's service, modem delivered on time, activated on time adn its a lot cheaper too