No, not in any way. Ability to be present for a test does not have any bearing whatsoever on cognitive ability, nor does any test on the planet account for whether or not the taker is present.
I think the suggestion is that people who have less free time might be in more of a rush to complete the test, and that surely affects test results without indicating cognitive ability.
I'd bet they don't consider incomplete tests, and most people I think would just peace out in ten or less questions vs continuing on either uninterested or rushed for time