Oh, here's an excerpt from a completely different book by Thomas Taylor which has an explanatory footnote (sheesh):

After essential heroes, an order of souls follows, who proximately govern the affairs of men, and are daemoniacal according to habitude or alliance, but not essentially. Of this kind are the Nymphs, that sympathise with waters, Pans, with the feet of goats, and the like: and they differ from those powers that are essentially of a daemoniacal characteristic, in this, that they assume a variety of shapes (each of the others immutably preserving one form), are subject to various passions, and are the causes of manifold deception to mankind. Proclus, in his Scholia on the Cratylus of Plato observes, "There are Pans with the feet of goats, and Minerval souls assuming a variety of shapes, and proximately governing mankind, such as was the Minerva that appeared to Ulysses and Telemachus."

Proclus also, in Plat. Polit. p. 359, remarks concerning [these kinds of] daemons as follows: "As Plato however adds, in what he says about truth, that not only divinity, but likewise a daemoniacal nature, is entirely without falsehood, it is necessary to assume from this addition, that what truly possesses the nature of a daemon, and not a daemon according to habitude, is perfectly free from falsehood. For a daemon according to habitude sustains all-various mutations, and deceives those with whom he is friendly. But every essential daemon, and who is at the same time rational, is perfectly veracious; and if he is irrational, he is unreceptive both of truth and falsehood. Hence, Plato does not say, that every daemoniacal and divine nature is veracious, but that every such nature is without falsehood. For all these are unreceptive of falsehood; but this is the case with the rational kind, as being naturally adapted to be alone veracious; and with the irrational, as not being conversant with either truth or falsehood. Hence, whatever deceitful kind of daemons is mentioned in history, either as secretly assuming the office of delivering oracles, or becoming obedient to invocations, or being casually present with certain persons,—every such kind pertains to those who are demons according to habitude, proximity and alliance. But if certain persons are deceived by those who are truly [or essentially] daemons, they are deceived through themselves, and not through them, as we before observed respecting the Gods."

That is, they are drawing the conclusion that since essential daemons are always true, they never change shape (even though we may be deceived by our own minds in perceiving them). Hence, since Homer clearly says that the Athena of the Odyssey is the one doing the shapeshifting, they conclude that she is daemon-like rather than essentially daemonic and hence of the same category as ascended men, nymphs, satyrs, and the like.