The verizon tech support person I'm in contact with also indicated any updates come from Motorola and she had no knowledge of if/when verizon gets it.
I went into another verizon store and made phone calls to my voicemail to compare. I listen to my messages later on a clear land line. This time they actually had an activated moto x. It sounds just barely almost as bad as the two I returned (if that statement makes any sense). In other words if that was the phone I bought, I would not be happy with it. It was noticeably worse than the Droid Ultra, S4, G2, and iphone 5s. If I had to rank them though in order of best to worst: S4, Ultra, G2, iphone 5s, moto x. I found the speakers to be weak on the iphone and moto x. The G2 and S4 were fairly loud and the Ultra was about in the middle. I would not read too much into my "ratings" here as it was one call per device and could be subjective and maybe signal fluctuations can have an effect and I was in a pissed off mood after hearing another bad moto x and this time as a DEMO unit. I wonder if any employees actually try making calls - maybe they only go by what they hear to make sure it works.
Other little things I noticed... moto x earpiece speaker sounds like it filters out higher frequencies so you get more mid range. It sounded cleaner but at same time a person with a high pitched voice may not sound "true" (anyone notice what I'm talking about?). Moto x speakerphone is louder (or mic input made more sensitive) to person on other end.
Other purpose of me going in the store was to reconsider any other phone I might get after rejecting the G2 and potentially the X also if the update doesn't fix what I'm hearing. It makes me really skeptical the update will fix something so significant and reproducible if in their update description they say sometimes you get choppy audio. This is not choppy audio that I hear or have a problem with. To me choppy audio is the voice is clear when it isn't chopped, and the voice is not there when it is chopped. Am I misunderstanding what choppy means?