It is not DD if it is made up, I guess Goldman Sachs or other hedge fund firms don't require college degrees to work for them who knew.
Any cursory DD can easily see what his employment record and can also find articles from reputable sources that back up his education and work history.
I suppose all sources are wrong but we have yet to see any proof otherwise, so I think I will go with what I can see and verify and not what others say without proof