I'd expect there's some corporate-speak maximum that happens in middle management, and upper and lower people would use it less, with the curve being flatter for more bureaucratic companies.
Corporate-speak is usually centered around covering your ass with ambiguity.
CEOs dont feel compelled to do that on "private" emails but they sure as hell do it in public statements. They dial it up to 11 during layoffs or being interviewed about unethical behavior.