Nice bike and set up for a triathlete. Triathletes ride tempo (z3 heart rate / power) and typically use a more upright position so that they can transition better to the run. Bike racers go for better position and higher power.
Here is a pic of me on my Cervelo P2C at the 2009 Esparto time trial. My P2C is very light 16 pounds as shown with the Zipp / Trispoke. The bike handles fine and it is more about the rider than the bike. If you saw Fabian Cancellara in the prologue of the Tour de Suisse a couple of days ago, he just crushed a highly technical course at 45 mph. However, TT bikes are specialty bikes designed to go fast and there is a tradeoff between comfort and control. However, they are a blast to ride.