The IMC rating is NOT and never will be an instrument rating. It is a valuable addition to the ppl in that it gives a very sound introduction to the use of instuments and radio aids, but as Twin Aisle quite rightly states it is a 'get out of jail card' for those occasions when wx conditions deteriorate and make things difficult.
The world is unfortunately full of idiots with a ppl/imc who think they are airline pilots. They are a danger to themselves and everyone else.
Have you ever wondered why it is not recognised outside the UK?
Remember the ppl/imc that died trying to do an ILS approach into Le Touquet?
If you wanna fly with the big boys do an I/R....otherwise stick to nice sunny days.
rabbs