First, typically, the decision is made between five and seven years prior to construction. They are now well placed to make such decisions. At last two companies have decided to test two different types of technologies that will be in place around 2012. It can't go much quicker than that. This is simply the time needed to do the environmental studies and all the other things that need to be done prior to construction. However, immediately after that, the companies will easily be able to make the decisions, once they will have studied and tested all the technologies on a large scale, to reproduce this in all the other plants that will be built.
On May 14th, 2007. See this statement in context.