'Lesbians have more orgasms'

Daily Mail:
Women having lesbian sex are more likely to reach orgasm than those embarking on straight sex, according to a survey published today.
Researchers found that 76 per cent of women who slept with another woman reached orgasm, compared to only 69 per cent who slept with men.

Surely the thinking is flawed here - because there are twice as many women in the lesbian survey? (c: