I suspected this was going on in the collar Counties, and this confirms my suspicion. Delaware, Chester, and Bucks should be examined as well.
Yep - at the end of the very well reasoned article is the following:
When looking at votes counted up to November 10th, the mail ballots show a striking consistency in votes for Biden. The lowest precinct in terms of election day in-person vote share for Biden is Franconia 5, where only 16.3% of votes went for Biden. But even here, apparently 60.4% of mail votes up to November 10th went to Biden! The crazily heavy Republican precincts nonetheless all sent in strong majorities of mail votes for Biden. ....... The most striking thing is simply the disconnect in the levels, whereby mail ballots assigned to extremely heavy Republican precincts still voted overwhelmingly for Biden.
Folks should read this because the math is the strongest thing we have to show gigantic irregularities in only a few counties that completely changed the results of the election.
The numbers listed in this piece are impossible. We are talking some 1 in a million stuff here.