Non Yakju and Takju builds are all dependent on the Carrier. There will be some people with Yakjuxw who got an update and some without. It all depends on who your carrier is and when they decide to push the update. If you want the update you can flash your phone to yakju fairly easily so that you will always get the update immediately from Google. There are plenty of instructions here.
THIS IS ONLY FOR GSM DEVICES. SPRINT AND VERIZON CDMA/LTE DEVICES RUN A DIFFERENT BUILD AND YAKJU IS NOT COMPATIBLE.
For GSM owners: To see what build you have, go to maps > menu > about. There are many versions (yakjuxw, yakjuux, yakjusc, yakjuzs, yakjudv, yakjukr and yakjujp).
To flash, go here
But you must UNLOCK your phone to flash it, and this will WIPE your device.