He certainly had a let-off in the 71 in the first-innings at The WACA, can't remember whether it was a dropped catch or a poor lbw decision. I can't remember the score, but I'm certain it happened.
He was caught of a no-ball on 4 in the second-innings - that added 50.
As you mention, he was dropped by Nel off a sitter on 17 at The MCG - that added 100.
He was plumb lbw and not given on 95 in the 120 in the first-innings at The SCG - still played well, of course, but it's another let-off regardless.
I'm pretty sure the 143* in the second-innings was chanceless.
He had 3 let-offs in the 74 in the first-innings at Newlands - the catch-that-wasn't on 55, the lbw-that-wasn't on 60 and the easy skier on 61. Still a decent innings, of course, but certainly an indecent amount of luck.
At Kingsmead in the first-innings he was dropped by Boucher on 5 and had another catch-that-wasn't on 36.
As far as I remember the second-innings 116 was chanceless.
So - that's 10 innings, 9 let-offs. So, in other words (with 1 not-out) that's 18 chances given in 10 innings (as far as I know none of the completed-dismissals were unlucky). Yes, he did play a good innings or three in the time, but it's certainly not what I'd call the play of a man in the form of his life. The play, I'd say, of a very good player in reasonable nick.
No, it doesn't. He still batted exceptionally with the tail.
But he needed a let-off to get the chance to do it.
And but for that let-off, he wouldn't have got any of the praise he got.