How do we ensure Qos really works in Tomato?

I am trying to check out how useful the Qos is in the Tomato implementation. I like to test these scenarios to ensure the Qos really works just as it should and not just some fancy GUI with overheads.
Can one of you GURUs help me chalk out few test cases where I can really see the Qos in action? example how do I see KAZA, BITTORRENT, FILE UPLOADS etc to pick up steam in throughput with Qos enabled? Any/every help is much appreciated!!
regards
roy