Trek Domane and undamped motion with Isospeed? Being a car guy and autocrosser, I'm familiar with suspension systems and the necessity to find a balanced spring/shock combination to create the best possible compliance, ride quality and performance in the suspension.

So I can't help but think that the Isospeed technology on the new Trek Domane is a little odd as it's essentially all spring and no damper.  Aren't you going to essentially have undamped motion while riding? For example, you can see the bounce in this video... 
                
            

I haven't ridden one of these bikes yet, but I'm not sure if a short test ride would be enough to make a proper assessment.

And I know this isn't exactly a conventional spring.  So I suppose my question is if there's anything about Isospeed that gives it some sort of damping characteristics to minimize excessive bounce?
As you already suggest the behaviour is not that of a conventional spring. Compared to a conventional spring I would expect it to have some quite high internal damping so it may have characteristics similar to a spring/shock combination.