Tank, I am not an ICM expert by anymeans; consequently I cannot say whether or not it even works.
However, I would balance any theory with practical experience and I play almost exclusively 6 man SNGs on ipoker with reasonable results.
If you could share your sharkscope results, I could guage a better view of your expertise on this matter.
Tank is simply giving you the ICM analysis (presumably from sngwiz) and ICM is the universally accepted best theoretical model for stts. Whether Tank decides to let you know his sn or not, suffice it to say he knows what he is talking about imo.