Trike Dynamics?

I saw an item on Autoblog that Harley Davidson is going to develop a line of 3-wheel motorcycles based on its traditional 2 wheel products.

I'm not a motorcycle guy, so maybe someone out there can help me out. Aren't trikes less stable (in dynamic maneuvers) than motorcycles, because they can't lean into the turn, and are therefore more prone to rolling? How do you do an emergency avoidance maneuver on a trike?