Quite a few, I'd guess. Sure, they want writing that meets minimum standards, but first and foremost they want manuscripts they think will sell .
Editors operate under a double standard for purely business reasons.
They are far less demanding of best-selling authors than they are of newcomers. Because best-selling authors generate a profit regardless of the quality of their manuscripts. Best-selling authors are edited only lightly at best. I believe he referred to the greed factor of the publishing industry, that no matter what he submitted to his editor, the manuscript would be published because his name alone on the cover will sell his books automatically. And if you do try to write like one, you run the risk of possibly mimicking a major mistake.