Darkcoin "Architecturally Flawed"...

I'm involved in a discussion over on another thread where a Monero guy is possiting that Darkcoin is "Architecturally Flawed" due to the masternode architecture.

I've already posted quite a long response and he has come back with a whole load of cryptographic waffle which I haven't got time right now to respond to.

Could someone who knows what they're talking about have a look at this......

His original point: https://bitcointalk.org/index.php?topic=939072.msg10291319#msg10291319

My reply:

https://bitcointalk.org/index.php?topic=939072.msg10293523#msg10293523

His:

https://bitcointalk.org/index.php?topic=939072.msg10296615#msg10296615

Be polite.