I haven't come across that post, but most people who are rejected by PF on the basis of personal theories and speculative posts have the same opinion of PF.
Another important difference between PF and SE is that Stack Exchange is a company, and it's main source of income is the SE group of sites. Though most of the revenue comes through Stack Overflow, the other sites, too, generate revenue; otherwise they wouldn't have been allowed to take up space on their servers. PF, on the other hand, is maintained by Greg as a part of his passion, and he is not aggressively looking forth to generate revenue from the site. This outlook is fundamental to the difference between the two sites.
Remember what happened a few years back with Monica? It was a storm that shook the very foundations of the SE company, and many users of SE, especially some moderators, still have on their username phrases like "reinstate Monica". Can't think of something like that in PF.
As a side note, I discovered that Physics Stack Exchange Meta has
quite a few questions that mention PF. One of them even talks about partnering with PF.