Mississauga is obviously a standout among all of these. But remember, that's one HUGE construction site that is still in its "fetal" stage. The blocks will get smaller. More new streets (Main St., etc.) will be under construction. Extensions of existing roads (Kariya, Duke of York, etc.) will be under construction. New roundabouts soon to commence construction. The anchors will be detached from the mall. They are now in process of reducing lanes in some of the roads (to 1 lane per direction). Busy, busy, busy!
They just halted all development surrounding Square One, which is good news, because Square One's owners keep on building car-oriented small-box stores. Also, City Council is planning to permanently close a short segment of City Centre Dr. in front of the City Hall to discourage the automobile and not endanger the lives of people using the Celebration Square.
St. John's is somewhat weird. But that's their topography. Who's to blame?
And BTW, are those at the same zoom levels?