As long as there isn't any detail about what they meant with these, you can expect everything from a developers team which officially ignores its BitcoinTalk vommunity -- a community gathered right here, in this very thread.
Your explanation is reasonable, but you can't know for sure what's in their mind and they don't seem too interested about security. For example, staking can be done only with unencrypted wallets. PoW works with encrypted wallets though, but PoW revenues are just 10%. Why is PoS possible only with unencrypted wallets? To be able to lose your funds more easy?
There are two reasons why. Most proof of stake coins (not delegated proof of stake coins) require users to be online and their wallet must be unlocked. See NXT. WebDollar is Proof of Stake not DPOS (Delegated proof of stake). The advantage of pure POS despite of DPOS is that it creates more security for the network as more people have to be online to stake and you can stake without spending coins (example the delegate/change delegate special transactions).