I find one of the most compelling arguments in favour of SFAs the fact that our bodies store most excess calories as saturated fat in our fat reserves. Why would they do so if SFAs were so bad for us? This is a point that Mark makes in PB.
F 5 ft 3. HW: 196 lbs. Primal SW (May 2011): 182 lbs (42% BF)... W June '12: 160 lbs (29% BF) (UK size 12, US size 8). GW: ~24% BF - have ditched the scales til I fit into a pair of UK size 10 bootcut jeans. Currently aligning towards 'The Perfect Health Diet' having swapped some fat for potatoes.