I prefer twitter, rather than facebook. Sorry to say, but I think, Facebook is good at copying other social networking features to enrich itself. And now, it's Twitter re-tweet feature that Facebook going to catch-up.
Interestingly, the Twitter retweet was originally started by users of the site who felt that a particular tweet needed spreading to the masses.
Now that Twitter has actually made the option official, it does seem that a lot of people are shunning this method for the plain old RT.