Seth Weintraub of 9to5Mac:
Over the last month, we received page views from Mac OS 10.9 machines geo-IP located both on Apple’s corporate network and in the Bay area. There are at least four different IP addresses that these hits are coming from, and the screen resolution on at least two of them is consistent with the 15-inch Retina MacBook Pro’s display.
Same. My first “Intel 10.9” hit came on August 13, actually. They’ve been steadily increasing since.