Sure is better than this
[video=youtube;aoQjXidhR5g]http://www.youtube.com/watch?v=aoQjXidhR5g[/video]
But when you riding in a group during rush hour and holding the left lane, you can be sure that cars will try to squeeze in (which a lot did). Either move from the left lane or keep a position where you can block cars from merging in the middle of the group... The first option of course is the best.