Based on the skills he exhibited in the LUK SIU FUNG novel series, Luk Siu Fung's martial arts were on par with those of such individuals as Sai Mun Chui Sheut and Yip Goo Sing. People who have read the novels, however, have often hinted that Luk Siu Fung had additional, untapped skills that, in fact, put him significantly ahead of the likes of SMCS and YGS.
Is this really so? How do we figure that he has such skills if he never shows them? What kind of skills are these? Even TVB's highly inaccurate THE NEW ADVENTURES OF LUK SIU FUNG (1986 series with Alex Man in the lead role) gave him a "secret martial art" called "Phoenix Dances Across the Nine Heavens," which was the title of one of the LUK SIU FUNG books, but not really the name of a secret martial art he practiced. In the series, the "Phoenix Dances" enabled him to defeat an enemy so powerful that Luk Siu Fung using his regular martial arts and Fa Mun Lau combined couldn't defeat.
So is there any merit to this idea that Luk Siu Fung had additional martial arts that made him much more powerful than he normally seemed?