I always wanted to know this, and I found this question from somebody else written perfectly, so I'm going to copy and paste the question here:
When Gamefuel rules are enabled, with automatic classification turned
off, will low priority (set to 255), gamefuel-prioritized packets
supersede packets that do not have a gamefuel rule associated to them
at all (e.g normal traffic)? Does normal, unruled traffic fit
somewhere around medium priority traffic?
Thank you very much.