I agree with you and
@bazang. Real world use on my end with F-Secure I haven't noticed this either (4 PC's). Including PC's with 8GB of RAM and one Windows 10 PC with a 4th generation Intel Core i3 cpu.
I guess if that were the case according to the chart, Bitdefender users would be a little miffed or wondering about that one, too?
The only way to know for sure what exactly AV-Comparatives is talking about is to download the Procyon test suite that it uses and test it yourself.
AV-Comparatives does test for shutdown and boot times, but never publishes them.
They use a "Good, Better, Best" qualitative, relative ranking system that makes absolutely no sense. People need a perception of time to judge. AV-Comparatives saying "F-Secure was in the Better category for file copy and program launch, making slower than most of the others." is not helpful. In fact, it deserves a STFW? Unless a test lab publishes a matrix that lists times in units of time that people can understand, the entire point of the whole test is lost. The results mean virtually nothing.
Now "F-Secure was on average 300 ms slower than other tested software" - that is something people get a concept of what the result means, but they have no measure of 300 ms because they cannot perceive a 300 ms delay. Hypothetical example.