While I don't have the answer to this question, I do wish that I had the ability to suggest that someone (for example Ren) answer it. I hear that he is an expert on topics like this.
I would also like to see someone answer with a Hub. I think that pictures and graphs - and perhaps even video - would really help answer a question like this.
A Hub like that would really go a long way to showing how Hubs are a great way to answer questions.