My part of Riverdale presumably fits u2's definition of an established neighbourhood, since most of the houses were built between 1890 and 1920, yet the diversity that he talks of protecting in such an established neighbourhood consists of a single use which is residential, south of the Danforth, north of Gerrard, east of Broadview and west of Pape.
One of the characteristics of it are the long east-west avenues east of Broadview, unbroken by cross-streets, that were built up with houses within a few short years. Mine is one of a largish group of similar semi-detached homes built by the same builder about a century ago. They're part of a larger block without cross-streets that is considerably larger than, say, the Pier 27 site which u2 dismisses in that thread with, "single-use superblocks developed at once like this are exactly what she ( Jane Jacobs ) spent her entire life fighting against" and insists should have shopping and restaurants and goodness knows what other commercial uses inserted into.
Superblocks when it is convenient to call them that, and not superblocks when it is inconvenient to do so.