Even though I'm quite active, I wouldn't consider myself "high class" because I've never really been a power player. Closest I came to that is when I was I was supposed to head up a 5-alliance coalition within a coalition during NoCB, a plan that got scuppered when GOD/TTK/FFC attacked CCC.
That said, if the CN class system relies on a combination of activity within one's alliance/on the boards and political clout, I'd probably be "middle class."