Sure, but that wasn't the question was it? Honest assessment is just that, it doesn't require an appeal to self selected "experts" on the subject.
There is no such thing as an 'honest self-assesment'. It's just not possible - humans have far too much intrinsic bias with regards to their own self-image (i.e. we lack objectivity with respect to ourselves).
As such, any scientific discussion of human intelligence needs objective testing criteria, and mensa is a world-wide organisation that imposes standardisation on such tests...