Engine, rear gear, Tourque Converter, Tire size info/question for the experts

just curious, if you are doing like 30 and get on it does it sound like it's slipping or does it get up and go? I have a PTC 3200 9.5" in my car right now and i can't tell the difference from a stock one unless i hammer it from a stand still. Older converters were way sloppier