You can make a research yourself with charts and hookers if you want so. I will give few examples of most successful projects:
- Mastercoin (ran by public persons; transparent) -> huge ROI
- Ethereum (ran by public persons and escrowed) -> 20x ROI
- Factom (ran by public persons and escrowed; open and transparent) -> 200% ROI ATM
- etc
Unlike legit projects scams are not open and transparent because they have nothing to report as no work has been done.
If you did a little research, you would see that CFB, mthcl, and iotatoken are all public people. You can find their full names and countries of origin. Even whitepaper reviewers like Kushti are public. The difference between Iota and the other coins you listed is that Iota team doesn't feel it's necessary to advertise their names as a way to increase crowd funding.