I'm not sure medical science understands (well enough) the relationship between carbs/blood sugar/cholesterol and cardiovascular disease
Sadly, medical science has, for decades, had a better understanding than you seem to think. The problems arise from advisory organs (from the individual dietitian to the WHO) having to justify their existence by coming up with some kind of advice.
"In general, we're not really sure about a lot of things, but it is pretty obvious that nutrition raises your blood sugar levels, with the speed of the increase related to the glycemic index of the food and that both very high and very low blood sugar levels have negative effects on your body, so you should manage your nutritional intake based on your blood sugar levels. Oh yes, and don't forget the buffering effects of glycogen storage in your muscles and liver" makes for great but very unmarketable advice.
"Fat is bad, mmkay" and "High cholesterol will kill you" are a lot more palatable.
Who cares about scientific accuracy nowadays? Most 'journalists' don't. Most politicians don't. The average Joe certainly doesn't (at this point he doesn't even trust those scientist fuckers, always 'saying' different things in the papers).
Take it from me: the science is out there and has been for a while. Believe nothing you read about the subject of dietary advice, unless it is actual research or the stating of hard facts:
http://www.sciencedirect.com/s...
http://www.ncbi.nlm.nih.gov/pm...
(note the years of publication)