Here's a long detailed, objective explanation of everything related to this issue. It's probably more useful than the actual link and it may serve as one of the

Here's a long detailed, objective explanation of everything related to this issue. It's probably more useful than the actual link and it may serve as one of the best efforts to consolidate information on this subject on the entire Internet. If it contains original research only a couple of readers will be qualified to tell. Half the people who upvote this won't understand more than the first two paragraphs. Edit: I anticipated the potential questions and added more information. Add some graphs and this could be a master's thesis.