Like "It depends on many factors, the main ones being "what" was eaten and the "rate of time" that it takes for it to be digested and released into our blood stream. Some foods and the combinations thereof are digested faster than others. I suspect that there is no difference in whether or not the individual is diabetic or not for the speed of the spike to occur, but due to the inability of a diabetics body to operate "properly" the spikes are more noticeable for a longer period of time than usual. Straying away from the subject a little, this link may interest you: ~Mays~"