This pwo debate has raged on most every board at some time, and this just shows how controversial it is. Not sure why. In the end, all will gain with proper nutrition, rest and training. But, speeding this process up may indeed be possible.
I am in the dext or malto/prot. camp. I cannot see how taking in some oats, how they would do any good for glucose while sitting in your gut waiting to be digested. There is something to be said though for folks who grind up their oats, this will raise the GI. If you shred the food and increase the rate gatric emptying, this will of course make for more rapid absorption. But, still, in my opinion, at this time, not enough.
That being said, I would submit that the best way to go about this spike is to guage it to your needs. This will have to be done individually, there is no set formula. I propose if you do an all out leg workout, you would need a higher insulin spike to restore order than if you do an arm day.