The Sky DLM on ADSL is the dogs wotsits now. I dunno what BT DLM is like now but the new Sky DLM is very nice indeed.
Then again Sky haven't got much in the way of options to increase average speed mmm? Well not without paying BT more.
I think the DLM on Sky's better connections may get more "inventive" - such as Annex M.
We'll see although I'm not at all sure I'm going to jump on the FTTC bandwagon. Drive is getting re-done in a couple of weeks, good time to clear out the BT conduit of debris and put a grommet on each end