Yesterday I had the opportunity to hang out over coffee with rockstar nutritionist Alan Aragon and chat for a few hours about this and that. By the way he had whipped cream on his drink. err... paleo whipped cream that is!
A couple things that stuck with me was a discussion on saturated fats in regards to how big of a deal is it when it comes to body composition. According to research (and nobody knows current research like Alan) it's not as important as caloric intake when it comes to losing fat, nor does the source matter all that much.
And in the case of high fructose corn syrup, Alan says it probably won't do any more harm than regular sugar unless you are drinking the equivalent of something like 10 cans of soda per day for extended periods.
We also had a related discussion on different fad diets such as paleo, the zone, the raving no-dairy types etc... all of which don't really have solid science, nor common sense to back them up. Alot of those types of diets work because people generally cut the amount of calories they eat, thus losing weight, but ultimately it's hard to maintain ultra strict diets and so people fall off the wagon and gain the weight back.
In other words common sense. Eat what you like but make sure you get a wide variety of protein and vegetable sources.