In my opinion, early adopter is someone who knows bitcoin when it was able to be mined with a CPU.
That time when the difficulty was much less than nowadays
It is still mineable with a CPU, but the mined bitcoins would be worth nothing. Early adopters are the ones that were been able to find blocks with their CPU every few hours.
I consider the super early adopters to be people who were around up to the end of the GPU mining era, so mid 2013, just before the price went really high. As NorrisK said, we are all still early adopters, Bitcoin is still young and those of us here now are still a part of a niche market and a special group of people. The late adopters won't come until Bitcoin goes mainstream.
2009-2013: Super early adopters
2013-present: early adopters
When BTC goes mainstream (2020?) and later: late adopters.
Oh, that logic. So people who bought at 1000$ in November 2013 are early adopters? That's crazy to think about.
This is a currency. You never know what will happen when everyone knows about bitcoin. Gold had the same situation - when people started using it, it was worth very, very much.
Lets hope that bitcoin will someday be priceless