You would think that those people with diabetes in Europe would have undergone nutritional education and therefore have different diets to their non-diabetic fellows. Not so but there are a few small differences. People with diabetes tend to drink more soft drinks but less juice, wine and beer (and sweets). People with diabetes tend to eat a little more vegetables, fish and meat. Otherwise researchers who looked at the populations in the European Prospective Investigation into Cancer and Nutrition Study (EPIC) and the Multiethnic Cohort Study (MEC) found "only small differences in dietary behavior in comparison with cohort members without diabetes". 
Changing dietary habits is hard work. Does this mean that nutritional therapy in diabetes doesn't take place, that it is ineffective or that we need to do a lot more of it?
1. Nöthlings U, Boeing H, Maskarinec G, Sluik D, Teucher B, Kaaks R, Tjønneland A, Halkjaer J, Dethlefsen C, Overvad K, Amiano P, Toledo E, Bendinelli B, Grioni S, Tumino R, Sacerdote C, Mattiello A, Beulens JWJ, Iestra JA, Spijkerman AMW, van der A DL, Nilsson P, Sonestedt E, Rolandsson O, Franks PW, Vergnaud A-C, Romaguera D, Norat T, Kolonel LN. Food intake of individuals with and without diabetes across different countries and ethnic groups. Eur J Clin Nutr 2011 May;65(5):635-641. Available from: http://www.ncbi.nlm.nih.gov/pubmed/21346715