That is BS ,the ride will be just as stiff and hard with keys and you will need to get an alignment with keys also . the Keys put the same stress on the T bars . anyone who thinks you don't need to get an alighment after cranking the T bars or installing keys is going to find out the hard way what new tires cost in a hurry .
for an inch crank the T bars and get an aligenment ,for more get the Cognito leveling kit with the A arms .