I wonder if they haven't mixed it up with AMR-WB-support in .wav files and what not, as is listed in the official N9 spec sheet. If the N9 actually does support AMR-WB for voice, why haven't they responded to it in the ticket? Also, I just rechecked, but in the list of November 2011 the GSA the N9 isn't listed. Mobilsiden mentions a list of June 2011, so that might be a difference, but then why is it removed from the November-list?

But perhaps the best answer would be "HD-voice is supported in PR1.3", which would explain everything