CONF:
It may depend on how the instructor inputs the airspeed variation.
If the indicated aircraft speed is slewed directly, you'll get an effective windshear.
Check and see if you've got a 'Variable Airspeed Drift' malfunction available in the ADIRS section.
Using this malfunction can give a nice approximation of the Air Caraibes situation with appropriate ADR disagree messages and no windshear warning.