I don't believe so. The key is what kind of value you want to derive from the community engagement.
Value varies between organizations. For some it is code, for some it is newsletter sign-ups, for some it is social media...it varies.
I think what could be useful in this session is helping to define how people define value and then they can attach whichever numbers they need to it. At that point they then, in my mind, is not the numbers...it is the patterns that live inside the numbers. They tell the real story behind growth and decline, and thus value.