[Gordis]

Originally Posted by obloquy

His reincarnation was relatively unique, but his power was not. Note that he is still never spoken of as one of the greatest of the Eldar. Gandalf was not overly impressed when he explained that Frodo had seen "an Elf lord revealed in his wrath." In any case, the distinction you've drawn between Glorfindel and "the Elves" is a false one: if Glorfindel had slain the Witch-King it would not be unacceptable to say "the Elves killed the Witch-King," so in this case it is also rightly said that the Witch-King fled from the Elves. He did flee specifically from Glorfindel, but Glorfindel was not the most powerful of the Eldar remaining.

I have to disagree with you - I think he was the most powerful of the Eldar remaining in ME. Actually, Gandalf says:

And here in Rivendell there live still some of [Sauron's] chief foes: the Elven-wise, lords of the Eldar from beyond the furthest seas. They do not fear the Ringwraiths, for those who have dwelt in the Blessed Realm live at once in both worlds, and against both the Seen and the Unseen they have great power.'
'I thought that I saw a white figure that shone and did not grow dim like the others. Was that Glorfindel then?'
'Yes, you saw him for a moment as he is upon the other side: one of the mighty of the Firstborn. -LOTR ,"Many meetings"

I think it is enough to single Glorfindel out among the Elves - as a Calaquende of great power. But Gandalf was still tight-lipped: he didn't explain that G had been reincarnated, neither did he explain his own Maia status.

Here is what is said about the reincarnated Elves in "Of rebirth and other dooms of those who go to Mandos:, The Later Quenta Silmarillion, Morgoth's Ring:

The Eldar say that more than one re-birth is seldom recorded. But the reasons for this they do not fully know. Maybe, it is so ordered by the will of Eru; while the Re-born they say are stronger, having greater mastery of their bodies and being more patient of griefs

Also look at the notes following the Appendix to "Athrabeth Finrod Ah Andreth" concerning reincarnated Elves:

The resurrection of the body (at least as far as Elves were concerned) was in a sense incorporeal. But while it could pass physical barriers at will, it could at will oppose a barrier to matter. If you touched a resurrected body you felt it. Or if it willed it could simply elude you - disappear. Its position in space was at will.

Well, it sounds like super-powers to me...

Edit : found another quote in Home 12: "Last Writings"- "Glorfindel"

For long years he remained in Valinor, in reunion with the Eldar who had not rebelled, and in the companionship of the Maiar. To these he had now become almost an equal, for though he was an incarnate (to whom a bodily form not made or chosen by himself was necessary) his spiritual power had been greatly enhanced by his self-sacrifice..
An Elf who had once known Middle-earth and had fought in the long wars against Melkor would be an eminently suitable companion for Gandalf. We could then reasonably suppose that Glorfindel (possibly as one of a small party,(1) more probably as a sole companion) landed with Gandalf - Olorin about Third Age 1000. This supposition would indeed explain the air of special power and sanctity that surrounds Glorfindel - note how the Witch-king flies from him, although all others (such as King Earnur) however brave could not induce their horses to face him

And don't you get an impression (from reading only LOTR) that the WK feared Glorfindel more than he did Gandalf? The nazgul did attack the Grey Maia on Weathertop, the WK was preparing (albeit reluctantly) to fight him at the Gates, but the nazgul never challenged Glorfindel, even when he barred the road to them, hindering their mission.