The IMCR is I do not believe used in anger by the majority of IMCR holders.
I think that is true, but same is true of the IR - except for commercial pilots flying daily.
When I fly from here to say Spain, I use about 1% of the IR theory, 1% of the instrument skills, etc. 99% of IFR flight is in sunshine, on autopilot... Half an hour before you get there, you dig out the STARs etc... any monkey could do that.
With a well equipped plane, the need for currency is much lower than with a poorly equipped one.
I still don't believe the IMCR will be killed off in 2012 - the safety implications would be pretty serious.
The IMCR is purely a minimal set of instrument flying requirements which theoretically could have been an hour instrument training called the IMCR to a full IR called the IMCR with anything in between called the IMCR!!! IE IMCR is nothing more than a name.
The IMCR is a 15hr course, normally taking about 20-25. It covers all the stuff one needs to fly fully IFR, except sids/stars and other (trivial) airways concepts.