If you are using gigabit ethernet, you are limited by the USB interface of the harddrive connected to the P/P (400Mb/s vs 1Gb/s) no matter what. In practical terms however, the provided app uses the same method to serve files as plugapps (i.e. samba). You can also enable samba in your vanilla P/P by going to settings and enabling WFS (windows file sharing). The app is much more limited in terms of configuration than the plugapps version, but it doesn't require any changes to be able to access your files directly over your LAN. Use the app only if you care about having the P/P auto-mounted as a local drive.