Being an OG or not being an OG is not gonna give anything except maybe an ego boost.
Am I counted as a OG?

My opinion is three years is experienced, five and up is OG. But account age is just that, age. The first newbie tomorrow may be a better poster than a ten year old account. And a good number of newer accounts are old posters under new names.
👏 Standing ovation from yours truly.
Why does it even matter?