The updates are only as good as the scans of the packages. As this was accepted in Taiwan yesterday, their time, it will not be updated until the package enters the US Postal Service system. That will not happen until it clears customs, probably in San Francisco.
As somebody mentioned yesterday, tracking of packages is pretty useless. It is totally dependent upon somebody actually scanning the object. I have had packages where the tracking indicated it was still in customs, while in fact the package had been delivered. Don't worry about it. It will just drive you nuts.