Fair, I think it would be more appropriate to say higher capacity.

Ok, but the point of a test of this kind is to generalise its result. I.e. the whole point of an intelligence test is that we believe that a human getting a high score on such a test is more likely to do some useful things not on the test better than a human with a low score. But if the problem is that the test results - as you said - don't generalise as we expect them, then the tests are not very meaningful to begin with. If we don't know what to expect from a machine with a high test score when it comes to doing things not on the test, then the only "capacity" we're measuring is the capacity to do well on such tests, and that's not very useful.