One thing I found at a pd is when you have a nice clean furrow to work with it makes plowing so much easier. I also found that the Deere guys like to run behind you when you have a clean furrow like this.
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That way they can run right up on you and make their little green machines look tough. Then when you get to the end of the row and motion them ahead of you they elect to stay behind you. I can keep up with the 400 Deere machines on my SGT's and probably my 882. As the others have said, setup is the key to success.
One thing I learned at the pd's I've been to....stay the hell away from Sears machines. The ones I've been behind were horrible.