[aaronem]

That's an excellent article you linked -- thanks! From it I gather that no one really knows why serifs exist in the first place; that there is absolutely no meaningful evidence to support a contention in favor of either style on the basis of legibility; and that, at basis, the question is one of aesthetic preference.

[nchlswu]

No problem!

Here's an interesting anecdote I just remembered, though. A psychology professor of mine was attempting to replicate another researchers work. The result couldn't be replicated when the stimuli was displayed in sans-serif fonts, but it was replicated when they finally used the font the initial researchers did: a serif.

I'd bet serifs/sans may have some sort or psychological implications but I doubt it's as straightforward a relationship as often presented