they said "volume per minute" so, yes, they were getting the CFM they wanted

CFM is not a static value it depends on the 'load' applied to the fan, a fan with no restrictions will have higher CFM than the same fan facing no restrictions and the relationship between the CFM and the static pressure depends on the fan design. Low static pressure fans can't push air effectively through tubes or restrictions and the flow volume (CFM) drops because it cannot push the air on the output hard enough to flow. High SP fans usually have larger more closely spaced blades so that the air cannot escape back through the fan.

For example on radiators you need higher static pressure fans to push the air through the small space between the fins on the radiator, if you use a high CFM fan with low mm H2O (static pressure) the fan doesn't actually manage to push the rated CFM through the radiator. Same for ducting you see in 3DP applications.

CFM is a measure of volume moved, generally quoted at effectively zero static pressure. Zero static pressure is rarely reality. All fans will have a static pressure vs airflow curve, which will vary based on the design of the fan.

I doubt normal people have the tools to measure fan CFM, especially when mounted into a product or enclosure, so presumably the OP was going based on stated specs.