Rags, where in Nigeria do you operate?
My experience is that the briefing personell and atc's in Nigeria know exactly what RVSM entails and that they have been trained for the implementation! I further believe that there is a plan for the changeover period and that the concern should rather be about non rvsm aircraft that "plunder" into said airspace, than that the country is not prepared! Let us be more cautious about making general statements on a public forum without verifying the facts first!
A valid question is "What is the experience in the rest of Africa?" Lets plan properly and fly safe!