The article says the Army never used them, instead, making them part of the Lend-Lease program.
However, I remember reading that they were used by the Marines in the pacific island hopping program and were fairly successful with the Japanese tanks they encountered.
...so, that never happened?
An actual combat photograph of the 1st East Lancashire's anti-tank platoon in action in S'Hertogensbosch, Netherlands, in October 1944. The platoon has exposed itself and its gun while the attention of a German tank, out of sight to the left, is distracted. The platoon has seconds in which to set up and get their gun into action before the tank can target them. The NCO in charge (2nd from right) was awarded the Military Medal for this action