GMC, I think I found the article I was talking about. It's from Dean Oliver. I don't think it has a static link, so you will have to click on the following link and then click on "Articles" from the menu at the top. There are several interesting--and a couple of related--articles on that page, but the specific one I had in mind is called "The Effect of Controlling Tempo."
http://www.rawbw.com/~deano/