You have got to be kidding me? The Abrams is an awesome machine. The only reason this could possibly happen is a lack of training due to financial constraints.
The challenge featured seven tank platoons in total. Denmark, Germany, Italy, Slovenia and Poland all competed with one platoon, while the United States sent two. Each platoon included four tanks manned by four men. Germany took the gold in its Leopard 2A6 tanks, while the U.S. Army in the M1A2 Abrams didn’t place.
The original source w/lots of links @ War News Updates: U.S. Tanks Fail To Place in NATO Tank Competition