If you are really looking to find a scam, the elephant in the room is Dash.
The dev premined boatloads due to a 'mistake' and he didnt fix it because the community was cool with it

ETH premined
ALL the coins..
No, ETH has mining, at least for a year or two until they switch to PoS. It seems like the premine will end up being something like 70% or so, unless PoS is delayed, in which case it will be lower.
Coins or tokens like Nxt/Factom/Ripple are 100% premined. Pretty different.
I couldn't care less if they tacked it on way later after the 2014 launch.