The same person also posted a screenshot on Weibo that shows a purported Geekbench score for the iPhone 6s. The image says the iPhone 6s will have an 1.8GHz Apple A9 chip and 2GB of RAM.
Diving into the matter, Geekbench founder John Poole recently decided to do some testing of his own by measuring system performance on the iPhone 6s and iPhone 7 running various iterations of iOS.