There are plenty of possible reasons why a person does not learn a particular skill, it is not necessary because they had a better one. LQS also did not learn BMSG when she had the manual, does that mean that XWXG is better? In fact, the likelihood is that they all had access to the same set of skills, certainly TSTL had access to BMSG, does that mean that her Supreme skill is better than BMSG? Considering that she is the oldest and started learning at age 6, the art that she would learn is likely to be one as a result of either, she was either allowed to chose among the list, or her master told her what to learn. Whichever it is, whether she chose or was told, the same thing must have happened for WYZ and LQS.
Another way of looking at it is this; Xuanci knew several of the 72 arts (cannot remember how many, it might have been only 1), why did he chose to learn those first? Why not something else? If we take your reasoning, then his must be better, but it was clearly not, all 72 had different strengths and weaknesses and the choice of arts could be either because they were told which to learn, a particular art appealed to them or suited their character. The same should be true of the arts that LQS, WYZ and TSTL had access to.
Not to the extent that they can see better in the dark.
XZ charged, beat up and jumped, none of which fits your definition of being able to move quickly and easily. I can do the same thing in a field full of gnome statues and I do not need good footwork to do so and I certainly do not call myself agile. Temujin has also translated the final chapter previously and this is how he translated this part;
So one was as sliperry as an eel and the other one was as fast as a flying bird, within no time at all Toan Ki (DUAN YU) and Hi Tiok (XU ZHU) had attacked very near the Liao Emperor.
http://www.spcnet.tv/forums/showthre...?t=8926&page=4
Can anyone else (The English Teacher cum Moderator perhaps?) comment on whether you would use agile or fast in the situation?
And yet you said this:
DY could learned the LMSJ in a short time b/c he was already familiar with the channels and the acupuncture points in his arms as a result of practicing the BMSG.
This is bookwork, not martial arts.
And the comment you raised by JMZ was from a time when DY had just finished learning and had absolutely never used 6MSJ before. Also, in terms of real-fight experience, XZ should at least have had spars during his time in Shaolin, while DY at that point had absolutely no real-fight or spars to base on.
And on progress, I give to you once more, 段誉百余招拆将下来,畏惧之心渐去,记起伯父和天龙寺枯荣大师所传的内功心法,将那六脉神剑使 得渐渐的圆转 融通。This was literally DY's first fight of any note in his life, i.e. beyond him executing 2 strokes and KO.
DY was also not a martial arts genius, but he was shown to be a fast learner of basically anything he sets his mind to. All your evidence on XZ being a fast learner is after his internal boost, but you have not addressed his time in Shaolin other than a vague shot that he was probably more interested in Buddhism. 20+ years and all he has for it is 2 skill set (can't remember what they were called, please refer to his fight with JMZ). The internal boost should not be looked down. Look at the QKDNY that ZMK learn. It was stated that normal people needed god knows how many years to learn each step, but he learn it in a day because of his internal.
DY was obsessed, not objections there. Obsession is his flaw like I had already said. But XF considering DY as weak willed is purely your thoughts and speculation and is not supported in the novel.
Finally, care to address this?