Appears to me ShadowCash are trying to do too much at one time thus preoccupied away from being thorough in their white papers. See upthread for supporting facts.
Thats for damn sure. Shadow is tackling the crypto end game while most people are just dicking around digging for shit to fling.
Also I do not think instant transactions are feasible. How would you divy out blockchain authority and ensure that a one to one transaction is secure without a vote (can't rely on closest/quickest response time)? But that is a whole nother topic and this thread should stick to the main theme of POS vs. POW and the perceived benefits/flaws of SDT.