Now, that is fast! I was reluctant to install it because it hasn't been updated in a while, but it certainly works for me.
I see someone has mentioned the permissions requirement for wp-config.php. That had me wondering, too, until I did this. I gave Quick Cache the permissions it said it required, activated and configured it. Then I set the permissions back so that wp-config.php was read only. Quick Cache doesn't seem to mind. If anyone knows why it should be a problem, I'd appreciate the info. Otherwise, I'm quite satisfied.