Fructose Prefeeding Reduces the Glycemic Response to a High-Glycemic Index, Starchy Food in Humans -- Heacock et al. 132 (9): 2601 -- Journal of Nutrition - http://jn.nutrition.org/cgi...
Looks like eating fruits 30-60mins before a meal high in starches (potatoes, rice, bread, etc.) reduces glycemic load by ~25%. - Sanjeev Singh