PoS usually pays dividends to stake holders (and even relays a percentage to the developers thus must register as a Money Transmitter with FinCEN) thus arguably creating investment securities under the Howey test and thus must be registered with the SEC or face possible jail time. I argue this impacts the resilience.
This might apply to most forms of PoS, but dPoS destroys transaction fees. I don't think that you can count that as having paid dividends to shareholders, as there are no transactions to each shareholder doing so. Yes, destroying transaction fees increases shareholder's percentage of the pie, but I think it is a bit of a stretch to claim it is the same as paying dividends to shareholders.
The other flaw of PoS, and especially DPOS and Dash masternodes (as pointed out by smooth et al) is you are paying yourselves via the shares from an enterprise that issued unregistered investment securities and which also requires each stakeholder to register as a money transmitter with FinCIN. I can't fathom how you convinced yourself that you are not going to jail in the future or end having to lick the boots of the SEC as Erik Voorhees did to wiggle out of jail time.
1. Again, dPoS is not paying dividends.
2. This point is conjecture from "armchair forum lawyers" (read: not lawyers). Obviously, most cryptocurrencies operate in a grey area, but to claim it is black and white like that is stretching the truth.