yeah, but your example can also be considered misleading w/out the actual 3GS drop call rate used in the study....
For example if the 3GS dropped 2/100 calls, then the iPhone 4 (3/100) drops calls 1.5 times more than the 3GS ...
Obviously the higher the drop calls on the 3GS the less difference and vice-versa, w/out the actual 3GS drop rate # used in the study to calculate the extra drop call in the iPhone 4, made up examples won't give the real difference...
That was the point I was trying to point out