For those of you still having trouble with syncing with Google while on Wi-Fi, try this:

1. Go to System -> Settings.
2. Go to Internet connections.
3. Tap Connections.
4. Select the wireless access point you are on and tap Edit.
5. Tap Next until you see "Connection setup: Complete"
6. Tap Advanced.
7. Under the Other tab, change Power saving to On(intermediate).
8. Tap Save, Finish, Done, and then Save to close out.

I would like to track how many people this procedure works for, so please hit "Thanks" if that fixed things on a consistent basis.