Your post is somewhat similar to mine that I just posted on my blog. I am a Type 2 and having problems now with meal time spikes that I didn’t have before. I am on low carb but have noticed a difference in the last few weeks.
I at DX was overweight; but came in with Type 1 DX symptoms at extremely high levels and extreme onset, all within about 2 months. I would have shortly been in DKA .
Watching closely my diet, exercise and BG now. Hope to get more tests done too. I am getting similar spikes now to yours however I am even more low carb than your test meals. Your right though it is a idiopathic disease and it reacts different in all of us.