So, the speculation that the houses were built on the north side after the airport was is incorrect.
If you would go back and read the post, you will find that the speculation wasn't a general speculation. It was specifically about whether the runway was there when the woman complaining about the hazards of the airport (a Ms Benson) purchased her current house (which she wishes would be purchased from her by the airport) I'd say that the chances that it *wasn't* are very slim.