Do not update. This 2.3.4 update and the HTC Droid Incredible has a fatal flaw. HTC said they know about it and are working on a fix. ETA unkmown. The update makes your phone stop syncing , no text messages,unable to update because phone thinks storage is full on both phone memory and SD card.
Got OTA update last week. No problems and startup/shutdown seem faster - though HTC retained the noisy "DROID" vocal on startup. Only downside so far is I miss the ability to press the top button and select "Silent" mode; only choices now are Off|Airplane|Restart so I had to add the Profile widget to have handy access to Silent & Vibrate modes.