Considering the state of another programme that should have been implemented by now in ACc, I would have thought it would be a while off yet.
If controllers are slightly reticent on new controller tools, then why should they be happy to train on Mode S?
The 'too difficult box' is not always 'ticked' by non operational staff! Implementation of a new system requires good will from all involved and a bit more of a 'get on and do it' attitude