Um, no. I don' rise by 6 mmols/l. My 3 month average before breakfast is 9.5, after breakfast it's 11.7. A rise of 2.4. On Wednesday, before breakfast it was 8.9, 2 or 3 hours later it was 7.9 - a fall of 1.
I do keep a spreadsheet of everything I eat, every day, with the amount of carbs I eat...