Hello, jhnhopkins!
Yes, I have towed a Caravan (sold the Beginning of this Year) with a Weight of 1.1 Tons (2420 lb) with Anti-tumbling-Clutch (from Westfalia AKS). No problems in any way. Official Speed Limit has been 100km/h (62mph). A little bit more Diesel is used (around 15% more), but the Power in Acceleration is marvellous! I should add that I have got the 6-Speed-Manual-Shift.
Also no Problems with Tumbling or sth else, but as you know, this depends also very much on how the Caravan has been loaded. I am always using the maximum Hitch Load which has been 100kg (220 lb) and loading as much as possible near the Axle and not too high "upstairs" in the caravan.
BY the Way: This Photo displays the Original european SE-Trim.
Aggressive Driving in Europe? I have worked some Months in US, Mexico and Canada and must say, that the Traffic in US and CDN is flowing very "harmless" normally (I think you understand what I mean, don't know the correct Word: a Mixture of calm, homogen, slow, boring, making tired, ...). Traffic in big Mexican Cities is... o la la... horrible is a good Word from my Point of View, I think. European People have got very different Characters.
In General, People from the South have got more Temperament, are more Cotnrolled by their Emotions, and they let their Emotions "flow". The more you get North, the more the People are rational. You can see this also in the Way of Driving. Let's say the Southern European People are driven by Temperament.
In Gemany we have additonally the High Speed Areas on the Autobahn. No Problem to drive with our Truck around 200km/h (125mph) for longer Distances (but maybe we have got aother Springs and Dampers...). So there are much People Driving even with more Speed, and sure, when you are not used to this Way of Driving, there will be much Surprises.