I... don't know. I just never pay much attention to this sort of thing, *both* the stick-in-the-mud and the groundbreaker extremes.
It really depends on the thing/activity in question, and the crowd in question. Compare me to my mom, and I'm way beyond groundbreaker on most everything. I'm an Extremely Early Adopter of most things technological, although lately markedly less so when it comes to Appleware (because it's just so much better to wait for v2.0, which will be better and cheaper). Hot new authors get put off until years after they became popular, unless it's sci-fi, but even in the latter case I'm behind the times compared to other SF fans. New restaurants I'd be at the forefront of exploring, except for those pesky finances.
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It really depends on the thing/activity in question, and the crowd in question. Compare me to my mom, and I'm way beyond groundbreaker on most everything. I'm an Extremely Early Adopter of most things technological, although lately markedly less so when it comes to Appleware (because it's just so much better to wait for v2.0, which will be better and cheaper). Hot new authors get put off until years after they became popular, unless it's sci-fi, but even in the latter case I'm behind the times compared to other SF fans. New restaurants I'd be at the forefront of exploring, except for those pesky finances.
And so on, heavily context-dependent.