Nintendo released a new system update yesterday for the Wii U, this will update your system to 2.1.3. The only word on what this update does is that "further improvements to its overall system stability will have been made." It is important to note that this is not the big spring update that Nintendo announced on Nintendo Direct a while back. This update is only 30 MB.

After installing the update, I have noticed that the different app and games do load up slightly faster.