The problem is EXACTLY what you are saying: we don't even know what Kenny is yet. He threw a few good passes that were reminiscent of Ben throwing while scrambling and the whole Jockocracy on the sports media outlets were saying he's the guy in Pittsburgh. The sports media suffer from the same problem cable tv when CNN was born had/has: gotta feed that beast 24/7. The internet has only made it worse (specifically you tube) with everyone and his dog an expert now just because they started a Steelers themed channel.
I called the season at 8-9 on social media during training camp and I was called crazy....they were going to "make it to the AFCC game" ..... And they believed that because all these younger fans(for the most part younger) are egged on by " Fake Sports News." So, we don't know what Kenny is yet. I hope he is the second coming of Joe Montana, but we have to reserve judgement for now. To quote a famous press conference coach " We need a bigger body of work from him."