Over at Instant Runoff Voting facts vs Fiction we have updated our page about IRV's pattern of plurality results and frequent majority failure in US locales.
Additions include the majority failure in Cary, North Carolina's 2007 instant runoff voting election, and an Nov 2009 update on San Francisco's election data, including San Francisco elections held by IRV (instant runoff) and ordinary top-2-runoff (T2R) by Warren D. Smith.
If your goal is to end plurality elections, or ensure a majority result, then instant runoff voting is the wrong election method to adopt. If you want to learn more about election methods, there is an excellent discussion group hosted by the Range Voting folks.
Learn more about instant runoff voting's majority failure and plurality results in actual elections in the United States - here.
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