I remember someone in some thread said something to the effect of: If you step back and look at SMB1, is it really that interesting of a game to TAS?
The short answer, IMO, is no. Its an action game with a limited move set, and not a ton of variation in the scenery. However, that said, SMB has the weight of being the single highest selling game of all time, and therefore is being treated and considered differently.
If, for example, Felix the Cat had a different set of glitches in PAL,
http://tasvideos.org/738M.html, would people still clamor for a 2nd category? Where will the line be drawn for accepting PAL versions of other games?
The point I am trying to make, is that this run fails to add anything more entertaining to the site. It simply demonstrates the difference between two versions of the same game.