It is with equally great regret that I must inform you that the source of information on the personal wealth of those other individuals you mention isn't strictly limited solely to a blog, on Forbes.com or otherwise. Many cross-referencing using various reliable sources of data and audits exists for those people. As mentioned earlier, Forbes.com's blog post on Agostinelli isn't sourced with any data whatsoever; therefore, no one is in any position to decipher where they obtained their information. The financial journal (OGFJ) cites the $1 billion fund value in what would appear to be as reliable as one can get given the disclosure came in the context of a major financial transaction which would have implied due diligence. The Forbes.com blog source must therefore be treated accordingly and not taken as gospel or absolute. For all we know, it could be a well-orchestrated public relations bamboozling. It certainly wouldn't be the first time. Until reliable personal hard fiscal data and financials are available on this individual himself, it seems this article is duly balanced, particularly to reflect the various facets of this specific debate. Good day.