That pool is really not that good. I was mining it for a while after launch, and I had constant disconnects. I wouldn't doubt the pool operator was doing something wrong.
I've been on Big Verns pool since then, and never had a problem.
Talk to me when this has happened on multiple, more reputable pools.
I have used several of Paul21's pools and when they work they are great, but they tend to go up and down like a yoyo, he often says he is getting DDoS, hence not a great example to use as a short block time argument.
I seriously doubt that re-org splits from shorter block targets, create longer times to arrive at consensus on block chain validity, irreversibility is a function of number of blocks, not time.
At any rate the coins are out there, WDC/DGC, we shall soon know how they perform, no need to speculate.