Yes, I'd considered that when I wrote it, but it's an odd use of 'relative' when it might be equivalent to 'the same for everyone'.
not all possible minds, just human minds
EDIT: but if you thought all possible minds had the same preferences, then it would be subjective nonrelative, wouldn't it?
Less Wrong is extremely intimidating to newcomers and as pointed out by Academian something that would help is a document in FAQ form intended for newcomers. Later we can decide how to best deliver that document to new Less Wrongers, but for now we can edit the existing (narrow) FAQ to make the site less scary and the standards more evident.
Go ahead and make bold edits to the FAQ wiki page or use this post to discuss possible FAQs and answers in agonizing detail.