> But this scenario doesn't fit with Serrano's experiences of English, where nonnative English speakers who learned the language in a classroom are often more educated on grammar rules and complex technical terms than American native speakers. In my experience as an EFL teacher living abroad in multiple countries... this is not even remotely accurate. English students across the world are often "taught" a ton of nons…
I think it is quite plausible that, for any language, speakers that learned it as a second language will know the grammar and grammatical terms better than most native speakers (particularly monoglot ones).
Since you provided many examples, I will also give a few:
An astounding number of people overcorrect to "It was a present for my wife and I" or so, having trouble with the few remnants of cases (nominative, accusative, genitive) English still has. Similarly, many native speaker seem incapable to identify the much maligned "passive voice". Or, ask a native speaker under what circumstances you'd use the past perfect continuous.