I sent an email to HTC Support about this. I was very impressed. I received a response the same day. Below is the reply I received. I tried it and it works perfectly. I'm now a happy camper. :biggrin:
Dear RezoundHound,
I understand that voice to text is not capitalizing the first letter of a message. I know how handy speaking a message or note is and I will be happy to assist. This is actually the normal functionality of the Google voice to text function. What is happening is that the voice to text feature is unaware of what text may or may not already exist in a message window, so the safe default is to make the first letter lower case. If you enter voice to text and note periods in the dictation, the voice to text function knows to capitalize the program. If you are mostly using this for text messages you can try holding down the search key on your home screen and saying "Send text" or "Send email" and it should capitalize properly.
RH