That's what I do on my 50 mile drive to work. Switch the radio on, brain off and follow the juggernauts. It's so much more relaxing than getting stuck behind them when they over take each other, plus your saving money. Since I've had the disco I've been driving much slower than I used to and its surprising how little time it adds to your journey.
i reckon you save more time by picking yer lanes in traffic than you do by getting silly on the open road.