Judging from what I've heard from others, it seems like there are some cops who believe that the speed limit is absolute, and there are some who feel that the flow of traffic is more important. So either way you're screwed, it just depends on which cop you get.
*Stares at title* Here's the thing though, the slow, (or chicken), lane is for driving under the speed limit, (up to 15 mph below), and the fast lane is really for those who want to drive the speed limit, or faster than the other lane, (I know it isn't working like this, but still).
http://www.youtube.com/watch?v=NMYKXSPgaIw
http://www.youtube.com/watch?v=2KVhWfjUYkw
http://www.youtube.com/watch?v=H5EyOnccJLg