Just had to cancel my watch update. It started at only 10 minutes to download but then jumped from 7 minutes left to 14. Next it decided to pausethe download saying it would restart when I connected my iPhone to WiFi; only problem was the phone WAS connected to WiFi! When it decided to resume downloading, it said it would only take 2 days to download, then switched to saying it would take 6 days! The WiFi is working just fine and the phone and watch were only a couple of millimeters apart.
Apple strikes again!