No. FWIW, I merge early because that is the custom here, but I also acknowledge that Jamil is correct that the "zipper" method would work better.
Here is another way of thinking about it. Everyone seems to agree that the basic problem is that there are some @sshats that zoom past everybody else that have already merged and force their way in, causing people to slam on their brakes. What would be the most effective way to combat that? Is there any chance we will ever get rid of the @sshats? I don't think so. How about if everyone did the "zipper" method as shown in the video? How is the @sshat going to zoom past everyone? There is no open lane for them to try to force there way in, that is the point of the "zipper" method. Merging early invites @sshat behavior, merging late would prevent it if everybody did it.
Again....common sense. It is easy to see who does and does not have it.