Totally off-topic but what I find much more annoying is the way Canon switched around the zoom ring and focusing ring on the 24-105. Now THAT is irritating.
Switched from what? Zoom ring closest to the body, focus ring further out is the norm for L-series lenses. The 'reversed' lens in the group is the 70-300L - but you're right about it being irritating. I've found that using the tripod collar for the 70-300L helps, since I hold it by that, which places my fingers at the outer zoom ring by default.
My travel telezoom, the Tamron SP70-300mm F/4-5.6 Di VC USD is that way, too. I'm thinking of upgrading this to the 70-300L. It will be a major upgrade in image quality amongst other features, but as an added bonus , then all my lenses will rotate the same way, but obviously the 'switched' situation will stay. It is a little strange Canon choose to go this route with this lens, the other 7x-300 lenses all have the focus ring near the front element (okay, the 'L' is rear focusing, so that's probably the reason).