I think there are some important points here. If you compare total Cholestrol to all cause mortality you get a U shaped graph with the lowest mortality in about 200-250. It appears that the causality in conventional wisdom is skewed. Cholestrol may be protective in cases and it may be reactive in cases. To say it's a causal factor of anything is unproven. To lower it artificially is like taking the battery out of the smoke detector to prevent fires.
In my opinion the key number to look at is the Triglyceride/HDL ratio which should be below 1. A high saturated fat/low carb diet will lower this number.
In general, everything in this article is consistant with what I've been reading although not with what my doctor's telling me.
I like this:
A Medical Research Council survey showed that men eating butter ran half the risk of developing heart disease as those using margarine