I think a lot of people make some sort of correlation between forum join date and length of time using Sonar.
That may have some loose connection but certainly not for everyone. Personally I'd been using Sonar for 6 years before I joined and I'm sure there must be thousands of users who use it daily but don't come here.
Some people have lives.....
Obviously I'm not one of them.......
<----------------User name and join date can be seen here.