There's that, and there's also the tendency for humans to feel nostalgia for a time that never was. Memories are poor. I suspect if people were asked to guess w

There's that, and there's also the tendency for humans to feel nostalgia for a time that never was. Memories are poor. I suspect if people were asked to guess whether a thread was from today or 2008, they'd get a lot wrong (aside from chronological details giving clues).