I think short bullet points are great. That way the audience can take them in quickly (I highlight one at a time to prevent them from reading ahead/behind) without being distracted for more than a fraction of a second. It also helps people to see how many items are being discussed (e.g., "there are three reasons that language X is better than language Y"). For me at least, that makes it easier to remember the reasons, since it functions as a checksum.
