The following graph was extracted from a 2013 Pew Center study on LGBT people. The study is nationally representative. The graph is based on a question which asked LGB people how much they feel they have in common with people from other parts of the community. The numbers are based on those who said "a lot" or "some". People who responded "a little" or "nothing" were not included.

A few observations about the results:

1) All LGB groups felt they had more in common with each other than with trans people.

2) Despite the trans obsession with painting gay men as their tormentors and oppressors, gay men were the most likely of LGB groups to say they have a lot or some in common with them.

3) Despite the trans campaign to paint themselves and bi people as brotherly underdogs fighting a gay-lesbian axis of power and prejudice, bi people, male and female, were the most likely to say they have little to nothing in common with trans people. In fact, a plurality of bi women (39%) and a majority of bi men (51%) said they felt NOTHING in common with them.

4) Trans results were not displayed because their sample size was too small for the results to be reliable. That is, even within the LGBT community, trans people are but a tiny minority. However, PRC placed the following footnote in their report:

[quote] The number of transgender adults included in the sample is too small for quantitative analysis. [bold] Nevertheless, the pattern of responses to this question among transgender adults suggests that they may not appear to perceive a great deal of commonality with lesbians, gay men, and bisexuals. [/bold]

I've noticed that trans activists like to make fun of most LGB issues, such as marriage equality, as being bourgeois and irrelevant to the lives of LGBT people who matter most. Clearly, they don't feel much connection with them. However, when people start mumbling "DRP0P THE T", they rush to say that LGB and T people have so much in common, that "our" enemy is the same, namely cisheteronormativity. Based on the survey, however, it seems these activists are either disconnected from the trans mainstream, which doesn't perceive much of a link between gender identity and sexual orientation, or embellishing their views so as to continuing to justify their presence in gay groups.