The issue isn't driving 'high' or 'stoned,' the issue is driving without being aware of how the cannabis affects you. This is true for every new strain of cannabis being used. Cannabis is not like alcohol. Though you CAN compensate for the effects of alcohol, it takes saturation for long lengths of time and is inherently dangerous.
The study done by the AAA (American Automobile Association) has shown cannabis users only need to be able to pass a field sobriety test. Just having thc in their system is not enough to cry 'inebriation.'