Question:  iOS 6 was announced at what conference also referred to as "dub-dub"?
Sentence (from "Apple Worldwide Developers Conference"): The Apple Worldwide Developers Conference (WWDC, also referred to as "dub-dub") is a conference held annually in California by Apple Inc. The event is used by Apple to showcase its new software and technologies for software developers. Attendees can participate in hands-on labs with Apple engineers, and in-depth sessions covering a wide variety of topics.
Relevant evidence: Yes