Although it does add the caveat that my, "Weak emphasis could indicate European."
Oh. Right, then.
But then I noted that the site says you should remove any quotes from the sample content, as they will obviously be gendered according to their original author. "Aha," I thought - and stripped out the quoted comments from Obama's Facebook page.
With this, largely male-written, content removed my gender score was adjusted. To be slightly more male. And, apparently, a bit less European.
Lots of media commentators who wrote about my blog recently assumed that I was male. I ascribed the assumption to cultural bias (anyone whose gender you don't know is assumed to be male). But perhaps they were just subconsciously absorbing the science of gendered language use.