Well according to some golden lore individuals at Bethesda, High Rock is supposed to be around the size of Europe so that might give you a good starting point. Note: Skyrim is not to the true intended scale.
The idea with the tutorials on the website was to draw modders in that were looking for information on subjects. Then organically flow them in the direction of becoming members. They do draw a lot of attention, being some of the top 10 visited pages on the site. They are also easier to read than the forum tutorials generally. Usually the tutorials on the forums draw a lot of attention to DC but not necessarily to Beyond Skyrim where the ones on http://beyondskyrim.org associate directly with Beyond Skyrim.