XB1 people are a funny bunch keep hoping for miracles from MS. Maximum Gflops is dictated by hardware specs, not software.
A bad software/driver may utilize only 40-50% of the maximum theoretical power, better software may utilize close up to 90%. But it can't over come the hardware limit. If the specs says 1.18 Gflops, then that is the absolute best power the software can reach.
So I take it you're a PC master race guy?.. why are you here?
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Nice try though at spinning an article you apparently didnt read. The main draw of DX12 is going to be to streamline the overhead for multi-threading. With the lower level hardware access as well as less background running on the X1 the overhead wasnt nearly as much of a concern on the console.
Finally, it seems at least one console guy gets it
On a console, API overhead should never be an issue unless someone made a blunder
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