How hard does a quant work?

How hard does a quant work? This varies a lot. At RBS we got in between 8.30 and 9 andwent home around 6pm. The pressure varied. Some of the American banks expect much longer hours. Wall St tends to be more demanding than the City. In London 5 to 6 weeks holidays is standard.
In the US 2 to 3 is standard.