I wouldn't put much stock in that particular rumor unless AMD is going all in on servers to the detriment of consumer chips. Or maybe they're developing two cores but they've been working hard to re-use engineering effort until now. They don't have the number of silicon engineers that Intel has and not even Intel is developing separate server and consumer cores.
That Sunny Cove architecture slide shows a massive increase in the number of execution units.
It may be that Intel's next architecture, combined with memory speed improvements, is competitive with AMD.
But AMD also isn't sitting still. AMD's contributions (from what I can tell) include:
* Core counts have blown past 6 cores / 12 threads
* CPU prices have just been cut by half
* PCIe lanes have blown way past 8
* ECC ram is being offered in consumer PCs