Considering they finally discovered that their single thread performance blows and decided to engineer with that in mind, a lot higher than they were for anything since the Athlon X2. Don't expect them to leapfrog Intel though, it's highly implausible. They've been comparing it favorably against Broadwell-E performance, but that line is a dog in the single thread performance category. The fastest out there taps out with a 3.8Ghz turbo and is dwarfed by the 4Ghz Haswell E, and the soon to be released 7700K will smoke the previous king of the hill anyway.
If they match the Broadwell refresh in clock speeds while exceeding it in performance per clock only slightly, they could still end up a good 20% behind Intel anyway.
On the other hand, regardless of how well it fares, they finally have an acceptable product for something other than budget computing. Their processor line hasn't been remotely useful for people with money to burn for over a decade, it's been kinda sad.