Too good to be true. Typical...Because I'm a crazy mofo I got tempted to edit my address to remove the county. Low and behold it changed my delivery estimate back to 27-29 Sept. I re-added the county and it went back to 20-22 Sept. So for those who believe it's a 'caching' issue, you're wrong. It's a glitch, or a purposefully coded precaution to provide slightly longer delivery dates for locations that it doesn't recognise.