Sorry, been away.
Yes, but that is 1% of the population of couples who consider themselves couples reporting thusly. Since the sandard arguement is that gays are less able to form and maintain relationships a %1 figure seems highly unlikely to me.
Remember you're disputing 3% or higher based on your original post.
What doesn't seem rasonable in these political discussions is to exclude bisexuals. If the aguement is discrimination is okay based on numbers (or lack thereof) then all the people who engage in a behavior should count.