Having much less than seven is going to be basically impossible even if we don't finish the Urban Poor quest. The mechanics naturally trend us towards True Cities, as is intended.I think what Citino is saying is that having seven cities can by itself be problematic.
Remember that the Horsemans plague was only so bad because of all the negative disease roll penalties we got from having so many cities in one area.
Furthermore, I like cities, and so does most of the thread. They're great, and we're not spamming them nearly as hard as we could be, so I'm not worried about Urbanization for seven cities. They have their drawbacks, but they also have incredible strengths.