I have listened to the clips from this recording on the JPC site. I am immediately offput by the sound of this piano (or maybe rather the sound of his touch) and the equal tuning. About his style of performance I find it very conventional and not particularly pianistic nor re-thought, So even if I agree with much of his comments, I do not quite hear the results in his playing. You only need to compare with Rübsam's or Virginia Black's piano recordings (both excellent organ or harpsichord players too), which both have a very distinct and revelatory individual style.
It is true, that one on a piano often needs to emphasize the middle voices discretely in a fugue in order to make them stand out from muddy piano sound.
And this:
Quote Beausejour: The piano and clavichord take a different approach, however. There is less emphasis on the notion of articulation, and musical expression is created more through contrasts, accents, crescendos and decrescendos–in short through a wide range of nuances and colours.
is also true.