Born in 82. I barely played any arcade games in 94-97, arcades were on their deathbed in my area by that time. And my PC wasn't good enough to run games at 60 consistently. So I was used to PS1 and N64 frame rates.
I do care a LOT about 60fps now. I run everything on PC at 60 and have for years, and I'll turn down any setting to achieve it. I'd do it on consoles too if they gave me the options. That said, I can easily get by on 30, if I need to. And I DO need to, far too often...
But I really think most people don't care. I know somebody that's a big Ratchet and Clank fan, and a fairly hardcore gamer. He played the demo of All4One on my PS3 and I remarked that I couldn't believe that they cut the framerate down to 30, I was appalled. And his reaction was shock that I could even tell the difference. I even tried to demonstrate it to him by showing him the judder as scenery scrolls past the camera, and while he did see what I meant, he didn't think it was a big deal. This is someone that was used to the smooth feel of Ratchet games, so it's not like he's some "console pleb that never saw 60fps" or some shit, but it apparently meant nothing to him.
And on that note... Insomniac, you're fucking up