Yep, which is why I pay no attention to the average. All I do is read the one star reviews; the worse the English in them, the better the book probably is.
You can put psionics in your story and John W. Campbell will still buy it [1]. Not so magic.
[1] In fact, it will increase the chances of him buying it.
There's a troupe that performs Shakespeare in reconstructed period pronunciation, where the language was still experiencing aftershocks from the Great Vowel Shift. It's interesting.
Well, yeah, early on he wrote to a friend (from memory) "I have my Dunsany stories and my Poe stories, but where are my Lovecraft stories?".
Then he wrote his Lovecraft stories.