Ah I'm just quoting Tolkien in his letters when I say accepted, quote Letters 156
"the crisis had become too grave and needed an enhancement is power. So Gandalf sacrificed himself, was accepted, and enhanced, and returned. 'Yes, that was the name. I was Gandalf'"
Really we're just arguing over semantics here, my main point is that I was trying to reflect that the Nazgul cause an unreasoning fear. The Witchking above all of them, the fear caused at Minas Tirith caused all others to fee and to be unable to act. Gandalf alone was left to forbid the WK entrance.
The very act of Gandalf standing firm and opposing him and addressing the WK in a "Strong" manner (I will provide quotes when I find my copy of the book) suggests to me that whilst he felt fear, it was not an unreasoning fear and that in fact the WK-Gandalf battle would have been closer matched than many see.
It could be argued that by his intellect and command skills Gandalf won the battle regardless. It was through the very train of resistance that he had organised that aveted the battle between WK and Gandalf instead the fight fell to other, moral hands.