On a related note, I wonder if Gates writing this praise was spurred by something, maybe some news about Buffet. He's relatively senior (84), and has been running Berkshire for a while now. Maybe he's getting ready to give up the reins.
In fact, he builds up the reputation his menagerie of "very experienced people" to run individual businesses - I wonder how they will run things when Warren isn't around.
While you're at it, take some time to check out the Berkshire Hathaway site. It directly services what they're trying to do: provide investor information.