JB, actually, MolaKule has stated numerous times that Mobil is on the cutting edge of developing hi-tech esters and that these esters are used in the SuperSyn formula.
There have been two posters in the past who have been quite vocal about SuperSyn being all PAO, but neither one could back that up with any facts. One took the approach that the burden was on everyone else to prove he was wrong, which is ridiculous. He made the assertion, therefore the burden is on him to prove it.
Had Mobil been developing an esterless PCMO, there would have been some mention of it somewhere in the numerous lubrication trade journals. This would be a significant development, something that Mobil couldn't possibly keep so under wraps that not a word of it would leak out.
That being said, I have no doubt that the SuperSyn formula may indeed have less esters in the base oil blend than TriSyn did. The higher molecular weight SuperSyn PAO coupled with less esters would account for the higher pour points of all grades of SS across the board in comparison with TriSyn. But until someone can prove definitively otherwise, I'll never believe that Mobil 1 SuperSyn has no base oil esters.