No, the Stratix® V device IOE delay elements (D1-D6) are not compensated across PVT.
The delay element value is fixed and does not adjust for PVT changes. However during compilation, the Quartus® II software chooses the best delay value within its respective available settings to meet timing across all PVT corners.
Refer to the IOE Programmable Delay for Stratix V devices in the DC and Switching Characteristics for Stratix V Devices (PDF) for details on the delay element settings.