SFO may have gotten wrapped for cheating but even so, it still cheated better than its TSA counterparts.
How did they "cheat better"? The articles cited say nothing about whether the TSOs passed or failed the tests after being tipped off.
At Chicago O'Hare International Airport, screeners missed about 60% of hidden bomb materials that were packed in everyday carry-ons — including toiletry kits, briefcases and CD players. San Francisco International Airport screeners, who work for a private company instead of the TSA, missed about 20% of the bombs, the report shows. The TSA ran about 70 tests at Los Angeles, 75 at Chicago and 145 at San Francisco.
Call me a cynic, but due to SFO's history of circumventing covert testing, I'd suspect there still is some monkey business going on there!