That is true - but their testing methodoloy gives you no information about latitude in highlights and shadows. Transparency film typically blows out at +2 stops but can have -6 stops in the shadows (DxO test results) whereas neg has +14 in the highlights and -2 in the shadows.
Originally Posted by markbarendt
Given this information, the 'correct' exposure based on box speed may blow out highlights or block up shadows depending on scene contrast. Without checking, it is therefore better to slightly underexpose transparency film and overexpose neg film. But with checking it's better to place your tones where you want them!