Has this been fixed? I've not been able to reproduce this.
Google Now is using a female American voice, but with low quality emphasis. Google Translate is using a male UK voice, with much better emphasis. I don't know how to configure each to choose which voice.
The Google Translate link in a comment elsewhere, that forces the American pronunciation (and high quality emphasis), reproduces it. The default, UK pronunciation, does not.
To switch to the US voice, use this link: http://translate.google.com.mx/?hl=en
After using that, I got the female voice and it "worked".
EDIT: Try the US version: http://translate.google.com.mx/?hl=en#auto/en/filled%20with