Before revision:  The estimate of the thermodynamic susceptibility is shown to hold not only for quasi-static near-equilibrium measurements, but also for dynamic state changes in lipid vesicles induced by broadband pressure impulses of the order of 1 MPa peak amplitude and 10 microsecond  pulse duration.
After revision:  The estimate of the thermodynamic susceptibility is shown to hold not only for quasi-static near-equilibrium measurements, but also for dynamic state changes in lipid vesicles induced by broadband pressure impulses of the order of 1 MPa peak amplitude and 10 \mu pulse duration.