This is not a small update either. Weighing in at a massive 564MB, make sure your phone is fully charged and you might want to be rockin' a Wi-Fi connection before spending your precious data on such a download. OTA updates like this one are usually sent out in waves, or phases. That means if you don't receive it today, you will soon. You might also want to check manually to see if the update is already available on your phone.
source: @JasonMacHTC via IntoMobile