There is no easy yes/no answer , patches are still being worked on , but the overall indication so far , gaming performance will not take a hit that is noticeable to the user.
gaming appears to be only a few percent slower.
What worries me is some of the stuff that has been posted about the nvme ssd performance tanking around 8%, this would, in theory, have an impact on any program accessing the SSD to a 8% effect on performance would it not? This sounds like something that would indeed effect all users no matter how intel is trying to spin it.
Hopefully in a few weeks this is worked out and someone does a very thorough and comprehensive testing on it.