There are a couple of registry keys, (strings), you can add that help speed up the process:
HKLM\Software\Micros\Patch\BypassDBUpdate - Add this and set to true to skip over the db rebuild/upgrade after each patch. This cuts the upgrade time way down if you're installing multiple patches. Once you're at the final version just upgrade the database through DM
HKLM\Software\Micros\Patch\BypassReboot - Add this and set to true to stop the post patch reboot (I don't use this one, but it's an option)