@Mark_S yeah that sure would be interesting.
One thing we could measure more easily is how many community members who have met people “in the wild” who have ever heard of TW. AFAIK, I have never met anyone who has heard of it, not even tech people, and this is in spite of TW having been around for a long time now and it belongs in a very popular “product category”. Contrast this with, say, Evernote which AFAIK is also an independent product in the same product category. If I were to go around and ask who has heard of EverNote I would think quite a few have, and among tech people I’d say it is almost everyone. This anonymity of TW is what I base my impression on, but it is obviously a very, very limited view. Google trends give yet more clues.
Overall, for a project that is about as old as Evernote and Firefox - i.e older than both Chrome and iPhone- i.e stone age old in tech years, and at the same time so fantastic, I think TW is absolutely, and unfortunately, “minimal” for lack of a better word.