That number is for low performers, not for PIPs. Only a certain percentage of low performers make it to the PIP stage and even making it the PIP stage doesn't mean you are fired. Also that 6% fluctuates and isn't a hard and fast rule ever year.
And knowing how Hacker News works, I'll likely have someone show up and tell me that I'm wrong and don't know what I'm talking about. But let's just skip that part - I have direct experience and counter examples that back up everything I'm saying that go on for years.
And knowing how Hacker News works, I'll likely have someone show up and tell me that I'm wrong and don't know what I'm talking about. But let's just skip that part - I have direct experience and counter examples that back up everything I'm saying that go on for years.