"Is Sinsemilla pot or is it a loaf of bread. Looks like to me that Sinsemilla has a much higher THC content than 5%?"
"Marijuana potency as characterized by THC content is rising. According to data from the Marijuana Potency Monitoring Project, the average potency of samples of all cannabis types increased from 3% in 1991 to 5.2% in 2001. The potency of commercial-grade marijuana increased from 3.1% to 5% during the same period. In the late 1970s and early 1980s, commercial-grade marijuana THC levels were under 2%. The concentration of THC in sinsemilla was about 6% in the late 1970s and early 1980s, and averaged more than 9% in 2001."
http://www.whitehousedrugpolicy.gov/publications/factsht/marijuana/index.html
Note that the average of all types is 5.2%, including sinsemilla. Sinsemilla averaged around 9.% that year. Commercial grade was 5% or 4.72% that year according to the DEA link we looked at earlier. The reason the average for all types is so low is because for the most part what is out there on the street is plain old commercial grade marijuana. Even sinsemilla in this country though has never averaged 15% THC.
The potency doesn't matter that much anyway because people don't tend to smoke as much of the stronger stuff when they smoke, both because the stronger stuff is a lot more expensive and because it just doesn't take as much to reach the desired effect.