Yes thats one leak, there is also a live video of someone testing a HP Desktop and it got 1230 point's
I'm not taking anyone leaked slide as fact we know nothing about as facts, i'm doing the maths, 1523 points is well over 50% more than a 7700K scores at its 4.5Ghz stock clocks, scaling is never as much as a perfect 1:1 so add that to the higher than its core count difference its quite obviously a score derived from 4.7Ghz or more...
The chances are their result, where ever they got it from is from and overclocked 8700K.