These results are based on responses to the question, "Do you, personally, identify as lesbian, gay, bisexual, or transgender?" included in 121,290 Gallup Daily tracking interviews conducted between June 1 and Sept. 30, 2012. This is the largest single study of the distribution of the lesbian, gay, bisexual, and transgender (LGBT) population in the U.S. on record.... Exactly who makes up the LGBT community and how this group should be measured is a subject of some debate. Measuring sexual orientation and gender identity can be challenging since these concepts involve complex social and cultural patterns. As a group still subject to social stigma, many of those who identify as lesbian, gay, bisexual, or transgender may not be forthcoming about this identity when asked about it in a survey. Therefore, it's likely that some Americans in what is commonly referred to as "the closet" would not be included in the estimates derived from the Gallup interviews. Thus, the 3.4% estimate can best be represented as adult Americans who publicly identify themselves as part of the LGBT community when asked in a survey context.
Interestingly, the number of young people who identify as LGBT—and young people are likelier to be out—is approaching Kinsey's 10% figure, which was supposedly debunked by other studies. Are young people likelier to be queer? Or just likelier to be out? Why do more people of color identify as LGBT? What does it all mean? Tear it up in comments, Sloggers.