You guys are just too funny. ( Especially Kenny )

I don't have carpool lanes in my area, but luckily, I usually don't need one.
I don't commute for like 90 minutes to 2 hours either! ( Thank God )

But... on those days/nights I do need to do long highway driving, I also always find the slowest vehicle possible... usually a slow semi truck, and follow him if the roads are clean/dry. If the roads are wet/snowy/dirty then I slip in front of such a semi. Works like a charm. The Semis always slow down on the uphill parts and speed up on the downhill parts, just like I want to do.

And if I'm following 2 seconds behind, I still get some draft benefit, but I don't get blamed for being the slow-poke and holding up traffic, so drivers don't get mad at me... there's a semi 2 or 3 car lengths in front of me! And if I pull in front, the semi plays "blocker" and I don't get any tailgaters. So yes, I do think this is a pretty common procedure out there, and not just in carpool lanes.
-John