Expectations for warranty repair timing

All,

I've had a piece of audio gear back with a manufacturer for repair for a month, and want to solicit feedback here on what constitutes an appropriate turnaround time for warranty repair.  This isn't stipulated in the warranty paperwork, and there doesn't appear to be any guidance on this from consumer advocacy organizations, so I'm turning to you all to make sure my expectations are in the right place.  

A month (or more, we'll see) doesn't feel like a reasonable wait time to me, and it doesn't help that my periodic requests for updates have been met with dismissiveness.  Regardless, I'd appreciate hearing from others who have had similar experiences. 

Thanks!