Traffic Tip - What Lane Moves Fastest in Traffic?

I spent quite a few hours driving on the California freeways this past weekend and it set me to wondering: which lane should I be in when the traffic gets heavy?  I did some Googling on the topic and came up with the following... 

The lane that moves the fastest when traffic is heavy is the lane that has the fewest cars in it. I know, thanks, Dr. Obvioso -- anyway in that lane there is more space between cars, which allows them to travel at a faster speed. In general, the rightmost lane is the least crowded apparently, so it is often the fastest lane during heavy traffic. 

However, there are other factors that can affect which lane is the fastest, such as the number of exits and entrances on the highway, the presence of trucks, and the weather.

And now three tips for choosing the fastest lane during heavy traffic:

1. Stay in the right lane unless you are passing.
2. Avoid lanes with a lot of entrances and exits.
3. Be aware of the presence of trucks, cuz they move slower of course.