Quad sockets vs Dual sockets

Do you get a few quad socket machines or (slightly less than) twice as many dual socket servers? It is not as clear cut a decision as it used to be. This article will compare the power and performance of the current AMD and Intel quad and dual platforms, giving you some of the information you need to make a well informed decision. Please share your own experiences with the dual and quad socket question, we are eagerly awaiting them.