This is a blog whose latest entries deal with Xcode 6.0 beta 3 (out of at least 7 eventual betas, many of which made substantial changes to the language). Right now, the 'standard' Swift version is Xcode 6.1's (Swift 1.1), and Swift 1.2 is in its third beta. So it's definitely not representative of the current state of the language (which was, admittedly, in pretty awful shape at that point in time).