Who was that idiot a while ago who declared sailing false? He must feel like a jackass.
Really though I don't think you can speculate much past the word itself. It's not like there is any other new evidence to suggest anything, and that banner wasn't a sailing cape.
The banner showed a green dragon attacking crandor, and at the time the tutorial island was getting replaced, but the dragon mod simon was quoted saying "Could it be elvargs mother?" in more than a few words, and threw in a few Jack Sparrow quotes after, but if that thing on the highscores the icon wasnt false then fair enough, however.
On miniclip, the advertisement made my jagex, said 25+ skills, theres currently 24 skills, and the genie lamp has 24 icons on, with space for 2 more, and that was ony updated about 2 months ago, i believe this year isnt just 1 skill, and that it's 2, i believe its like smithing is to mining, and fishing is to cooking, jagex throw in a few quotes for jack sparrow, and the word sailing in the poll post, the evidence to me doesnt point to once skill, but infact two.. flame me all you want.
I believe it's sailing + one other yet to be named... Ned could also be the Achievement cape owner, since he is a retired sailer.