In my field, the reality is different about 2 points you mentioned:
Our flagship journal, which is hugely respected among all management concentrations, tends to be quite unbiased about the school names. For instance, in its last five issues, the majority of papers are authored by people from outside top 20 or even top 50 schools including Warwick, Clemson, Western Ontario, Kentucky, Cologne, Leeds, Bocconi, Arlington, North Texas, Aalborg and so on. Also, of the top 10 most productive and successful researchers in the field, 8 are non-native English speakers and have written the most influential and highly regarded books.