Well, it's complicated. Perhaps the survey should cover all graduates of pathology residency programs. For my colleagues who I trained with but did not find work as full time pathologists, it is difficult to include their salaries. Some are back in their home countries, some are working in research, one is a biobank director, etc. Pretty sure all are making less than $308K. Since there are training slots for 600 residents per year, and perhaps the average career is 30+ years, there ought to be at least 18000 pathologists, plus or minus, in the US. Not sure if there are that many - last number I remember was about 14000. I don't think the others died, or retired due to vast accumulation of wealth; I believe they could not find work as pathologists.
Also, it is hard to give credibility to a lot of the surveys and other data gathering techniques. "Careerexplorer.com" says the US has 372000 pathologists, with avg pay of $211K. I know that is not right, but it says it on the internet, so...
What I do know is I have no negotiating power, and people I trained with are working for other specialists who collect part of the pathologist's professional fee. That pretty much tells me all I need to know about the job market.