I agree that the specs are confusing but I have also seen several machines out of spec both above and below.
I imagine pressures average about 2500 because I've watched the spikes up and down but I don't see how gpms drop on a gear pump at full rpm and I have also seen the pressure spikes when I get into something difficult. Just never paid much attention to it as long as it was doing what I thought needed to be done. When it didn't "feel right" or I thought performance was lacking, I had it checked or turned up. Never asked to have it turned down when it was beyond specs.