Hi,
It is very often in the coins live that a big part of the coin supply is mined in the first several hours.
don't you see that as suspect?
It's often, however, normally it's different miners doing the job, not one miner monopolizing all the outcome.
Here is the detailed explanation how Vertcoin's instamine was mined with a hundred of instances launched 38 minutes after the coin went live and how the rewards were consolidated into few accounts. Nobody else could do that setup but devs.
https://bitcointalk.org/index.php?topic=576107.msg6397907#msg6397907