I don't know why. But it's true.
Oh, and on the lattice/cornerstones question, y'all were about evenly divided between the plain lattice and the lattice with white cornerstones.
I went with the plain lattice. It is harder to do, of course, but I'm liking it. I'm about half finished with this phase. Tomorrow -- oh, woe is me! -- I have to go to the LQS to pick up additional grey fabric for the border!
Okay. Go grab a piece of candy corn and bite the white off. You know you want to.