[em500]

Sorry for my negativity / meta comment on this thread. From what I can tell the stackexchange discussion in the submission already to provides all the relevant points to be discussed about this.

While the asymmetry of least squares will probably be a bit of a novelty/surprise to some, pretty much anything posted here is more or less a copy of one of the comments on stackexchange.

[Challenge: provide a genuinely novel on-topic take on the subject.]

[bee_rider]

The stackexchange discussion already provides a good answer.

I think there is not much to be said. It is not a puzzle for us to solve, just a neat little mathematical observation.

[SubiculumCode]

But bringing it up as a topic, aside from being informative, allows for more varied conversation that is allowed on stack exchange, like exploring alternative modeling approaches. It may not have happened, but the possibility can only present itself given the opportunity

[oh_my_goodness]

This answer is too grown-up for the forum.