I think we already know the answer but more conformation here:
In conclusion – the glycemic index is a completely outdated metric on which to base your diet or your carbohydrate choices. There appears to be no correlation between the GI of a food and an individual’s PPGR; as a result, trying to design a diet around the GI of individual foods is about as useful as trying to programme your training based on the length of your little toe.
An individual’s response to food is likely to be highly individualised. This needs to be recognised and accommodated for when it comes to nutrition recommendations – whether those be for the prevention of diabetes, reducing obesity, or sporting performance.
http://shreddedbyscience.com/glycemic-index-dead/