Read this.. Looks like we will all be getting it very soon.. FINALLY 
Redline.. Try the steps in this article
If you would like to try to force the update, try this set of instructions:
1. From your phone, head into Settings>Apps>All.
2. Search for Google Services Framework.
3. Once found, tap on it and choose Force stop.
4. Then choose Clear data.
5. Back out of Apps to your About page in Settings and check for the System update.
