Earlier quoted context omitted.
The ladders and breakdown of what is required at each position are well known and talked about frequently, especially around performance review time. If you're a googler and don't know what's on your ladder you aren't paying attention
I don't have any Google experience, but from what I've gathered over the years, there are always unwritten rules. Not everyone follows the spec. Often times, the spec even seems intentionally incomplete in retrospect.
For example everyone says value "work life balance is balanced here and encouraged". But irrespective of whether they actually do it or not - if the two people output around the same ballpark but one is visible as more serious/responsible and seems more invested usually by virtue of more hours at work that becomes more "visible" than the "casual" 7-8 hr person with the same output.