Perhaps you did not read the article and responding to the title. The article points out that 1/3 of improvement in past 3 years to meet regulation requirement

Perhaps you did not read the article and responding to the title. The article points out that 1/3 of improvement in past 3 years to meet regulation requirements was real improvement and 2/3 was just manipulation. It doesn't matter that people drive cars differently than they are tested in cars, to illustrate it they highlighted that due to those manipulations that difference now can be as high as 50% which is beyond claims that people drive cars differently than when they are tested in labs.