I'm not sure because I only speak for cloudminers.net, but I think these are individual issues.
I launched the pool 6 hours after the coin was released, at that time the diff was already 40 ish. I only got 30MH pointed to the pool while the diff of the coin raised.
We are at +/- 50% of finding a block, so in short we need more hash pointed to our pool in order to find blocks.
Supernova currently has over 1GH pointed to their pool, so thats why they are finding blocks.
Network is looking very healthy now. We may have merged mining working on a testnet; we will thoroughly test this before announcing anything further. We'll have an update very soon.