Jun 4, 2012 at 4:26pm ET by Barry Schwartz Below is what happened in search today, as reported on Search Engine Land and from other places across the web. From Search Engine Land: The Fleeting Nature Of Twitter: 17 Percent Of Top Searches Change Every Hour Nearly 20 percent of the top search queries on Twitter at any given moment won’t be a popular search query just one hour later. That’s according to a new research paper that Twitter will present this week at a social media conference. Twitter researchers Jimmy Lin and Gilad Mishne analyzed all search queries on the [...] Report: Siri Coming To iPad With iOS 6 With its latest iPad — “the new iPad” — Apple introduced voice dictation capability (via…