I agree they were organic'ish (ie, word of mouth and ZDTV) in the beginning (1998-2000 or so). As for search quality, you're seeing their growth from the point of view of a higher-than-norm-IQ-intuitor-type-rational than from the median/typical/pervasive point of view. The majority of internet/Google users aren't the "early adopter" types. They mainly use Google because that's what's there on there phone.