Plasmas with improved confinement by an Internal Transport Barrier (ITB) are considered in the Advanced Tokamak scenarios for ITER. Dedicated pulses to study the effect of poloidal (vq) and toroidal (vf) rotation velocities on the triggering and sustainment of ITBs have been carried out on JET. A new instrument has recently been added to the suite of charge exchange spectrometers allowing vq measurements up to 10ms in the ITB region, which is the same temporal resolution as for the vf and ion temperature (Ti). A torque and power scan was performed. Pulses with reversed and monotonic q-profiles are compared to investigate the role of magnetic shear on the ITB triggering and growth.