This is from the BBC website, and says it all for me:
Jenny Cooper, parent:
My concern is not that there would be a change, but that it might not be quick enough. Our oldest daughter takes her GCSEs next year.
I have another daughter two years behind her and a son in the year before that. With our other two children starting their courses before 2014, I wonder whether their exams will be devalued by the change.
If they really feel that we ought to be moving to the O-level style exams, then they really shouldn't be waiting two years to do it.
All the children taking the exams in the meantime are going to be taking papers like the old model of a car - devalued the minute people know a new model is coming out.