I've just been to the stats of travel.SE and I found their stats phenomenally better than ours. While 8 questions and 1800 visits per day is excellent, I do think that some part of this has to do with the objective of the site: academia is much more exclusive than travel; in other words, all academics can have travel queries at some point of time, but some or many travellers may never get academia-related queries.
This is the basis of my question: how sound is it to judge different SE sites based on the same set of criteria? Should A.SE shoot for the same targets as others?