I estimate that we had an 80% reduction in junk calls when MA introduced the state DNC list, and I'm hoping that this will get rid of 80% or more of the rest!
Well, here's hoping it works as well as the UK one (the Telephone Preference Service). Since I signed up for TPS last September, I've had no junk calls at all. Couple that with the fact that very nearly everyone of my generation calls my mobile, and I can very nearly get away with answering the land line "Hi, Mum".

Peter