Why did Sony stop selling Clie's in the US?

The Sony Clie's are all cool PDAs running Palm's OS. They have nice screens, lots of features, and are nice and small. I thought that they were selling well, and was kinda surprised to hear that Sony was pulling out of the market. It didn't make much sense to me.

But this article explains why. He attributes it to the Clie's being designed for manual-reading Japanese customers instead of Americans who won't RTFM. Instead of figuring out how to use the nifty features, they return the product claiming that it's broken.

So Sony quit.