[Gordis]

Originally Posted by obloquy

No, because the Witch-King ran and hid.

Yes, that is the reason why Glorfindel didn't kill him, obloquy. But you know quite well that Glorfindel was no average Elf. Actually, the reincarnated Elf was quite unique - closer to Maiar in strength.

In Rivendell there were but few who could openly ride against the nazgul - most likely only three (see Glorfindel's words explaining his presence on the Great Road to Aragorn).

The rest of the Elves were hardly more capable than a Man to withstand a nazgul.
At least none had tried:

[The other three Black Riders] are left to guard the eastern borders, to watch the Greenway, and guard against Elves or Dúnedain coming from eastwards.- "Hunt for the Ring" RC p.145
[The Witch-King] himself, [with two other Riders] redoubles his vigilance on the east-borders along the Greenway... his counsels disturbed by threat of attack. Some of the Dúnedain have met Elvish messengers, and [he] is uneasily aware that many enemies are watching him and though none has yet come with power to challenge him.- RC P. 164

Originally Posted by CSteefel

Also, in my opinion some have misread the encounter between the Witch King and Gandalf in the books (Peter Jackson for sure)--I think the WK decided to postpone the matchup. Hearing the horns of Rohan is not much of a reason to leave...

Indeed, but it is still a reason, an excuse.
The WK always hated to put his life in danger - and not because of cowardice, as I have tried to explain in my previous post:

Gordis: The Witch-King had no idea that the One Ring was about to be unmade. While the Ring existed and the Nine Rings had power, the Gift of Men was not available to the Nazgul. If killed, they would likely become powerless spirits without a hroa, roaming Middle-Earth but unable to interact with the World of Light in any way - and that until the Rings existed. Basically it would be eternal misery. Nothing to look forward to, thus the Witch-King must have been much more reluctant to die than any mortal Man.

Had he been on his own, he would never have dared to oppose the reincarnated White Wizard, a powerful Maia, in one-to-one duel. But he was not on his own at the Gates of Minas Tirith - there is no doubt that Sauron was watching him like a hawk. He must have known he was overmatched, but he needed an excuse to leave - and Rohan had provided it. He feared death, but he feared Sauron's wrath more.