Actually, they'll pop in and say that there are more straight people with it than homosexuals! I heard that a lot in college.
Even if that's so (and it's not), given the relative percentage of gays in the population, the RATE of infection for gays is far higher.
According to the CDC in Washington Times:
The CDC reported that homosexuals account for 48 percent of adult AIDS cases, 27 percent involve intravenous-drug users and 7 percent involve people who fit both categories. In 15 percent of AIDS cases, the risk factor was heterosexual intercourse. In the other cases, the cause was such factors as receiving tainted blood or tissues, or it remains unidentified.Homosexual and bisexual men are thought to account for a majority of the estimated 850,000 to 950,000 Americans living with HIV, the virus that causes the disease.