New update is being pushed out.
Version 2.1.0 U available
via wireless internet connection includes the following improvements:
Further improvements to overall system stability and other minor adjustments have been made to enhance the user experience.
Remember to not unplug the system while its downloading or installing the update, as it may damage your Wii U. The update may take up to an hour to download, according to Nintendo, so be patient.
The Update Is Round 650 MB
Update is now done. Doing some navigation testing…
Main menu – System Settings = 16.3 seconds
Exiting System Settings back to Menu = 21.7 seconds
Loading Miiverse from Main Menu = 12.2 seconds
Yeah those seem just as slow as before..
Also Don’t Worry SSBB Smash Stack still working In v2.1.0 YAY