I listened to the award speech with some delay and I had previously also caught some glimpses of critical "opinions" as to Jenner's voice and deliberately did not read them, because I try to stay away from those who tend to impose heavily binary views on everyone.
I kept watching and listening, and then I realised that if I was to disconnect everything I know about Caitlyn (which is not possible) and just listen to that speech, knowing that it is being delivered by "some" woman, I would totally buy. I would think that this is a woman of significant age, probably she has smoked a lot during her life, but it was female leaning voice, nevertheless. So, the rest does not really matter, but, of course, we know that it was Caitlyn who spoke, we know her history, trans-ness and the rest just goes on. So, why cant we leave her alone? She has achieved more than most her critics have ever done and most probably ever will (when taken all together btw)? Criticising her looks or voice almost equals the issue she referred to in her speech - and she said, go ahead, she can take it... so

.
As regards my own voice, I am content that it does not clock me immediately once I open my mouth. I know, it is not female, but it not really male either - some female friends have said that I sound like them when they wake up (except I keep going that way for the rest of the day). So, as long as it does its job, it is all fine by me.