Hi and tnxs for reading. Other posts are talking about iPhone6 and 6 Plus screenshot size for iTunes Connect iPhone 6: 750 x 1334 pixels for hi-res portrait 1334 x 750 pixels f
Screenshots for iPhone 6 and iPhone 6 Plus must be uploaded WITH status bar, e.g.:
App store screenshots sizes for all devices
The Apple Dev Guide hasn't been updated for iPhone 6 and 6 Plus, you are right.
Remember the iPhone 6 Plus screenshot dimensions differ slightly from the real resolution. See:
http://www.paintcodeapp.com/news/iphone-6-screens-demystified
(downsampling marked red in the webpage, no need to download the guide to see it).