well, to get back to the subject at hand, toriyama DID say that legendary ISNT a level, its just a name. so just as USSJ is a fan made term, so is LSSJ.
anyway, if you lesten to/read what vegeta said when he looks at kakarot, and talkes about the saiyan of legend, and how the power could only be manifest in the oozaaru form, then doesnt it make sense that just because the saiyans could transform to what we know as ssj/ssj2 etc. are only actually normal forms a saiyan will inherit at a certain point in there lives (if given enough incentive, ie. gokus friend being exploded, vegeta losing all his will to live), and that the only TRUE super saiyan would be an oozaruu, so in that sence, when goku goes gold in GT i can understand why he would be considdered the saiyan of legend, but then GT made an ass of itself again by making vegeta one as well. just another plot hole >_< thought id raise another discussion....