Not far off the truth. GMO tests upper 20's, sometimes 30+. Almost always higher than straight Chem D. And yet the latter is more potent in effect. GMO is a decent strain, no doubt but its nothing special. Bag appeal and thc% are two of the worst ways to judge cannabis.
Because weed is schedule 1, it's hardly been researched, which is how HTH, Delta 8, and all these other psychoactive components snuck through the farm bill.
All these % tests are misleading because we don't fully understand what it all means. The long chain cannibanoid/terp profiles are just as, if not more important than the THC %. Hell, Tom Hills Haze usually doesn't test over 20%, but the potent phenos will blow most folks wig back.