The Wired way has another huge advantage: if you put the full text and images of every article into your feed, then everyone who is polling the RSS is basically downloading the entire recent content of your website every time the client does its pull, which drives up the bandwidth bill immensely, and also ends up clogging up the RSS reader with all sorts of content which probably won’t get read and leads to longer download times and so on.
IMO, all that should be shown in RSS is the same sort of content which should be shown in another site’s link to the article – an excerpt which says what the article is about, maybe with a choice excerpt. Anything more should be provided in a standalone file which can be downloaded optionally.