I eat several pieces of fresh fruit every day - A banana, some raisins, one or more peaches, nectarines, or plums, perhaps an orange, and usually two or three apples - depending on which ones are in season. And my glucose averages below 100, both morning and late evening.
Remember, the primary diabetic problem is control of glucose levels. Sugar, from whatever sources, is turned into glucose in the liver ~ just like we were big ol' bumble bees!
I've been working at this for half a decade and I think I've gotten my daily swings down to about 110 points ~ can't imagine an "average" of 100.
BTW, bananas are NEVER recommended to diabetics. There’s no fiber in the fleshy part you eat and that sugar is just sitting there ready to be turned into glucose. I think the glycemic level for bananas is the same as white bread, orange juice and cane sugar ~ to wit: 100.