In my short experience it seems to be pretty random - I once had two stakes come in within a few minutes of each other, most times it takes 2-3 days to get a stake. The total amount of the stake should still amount to the equivalent of 5% per month whenever you actually get it.
So the amount earned will be shown in "stake" field, or in my total number of coins?
First in "stake" and after confirmation in total number.
Alright, thanks. I guess I just expected some kinda staking to happen, since I added the 350 coins to my wallet on 27th, meaning it's 4th day today with the wallet unlocked and running...
Also note that the Stake field will NOT increment permanently. It will only show a value when it is in the process of staking (so 50 blocks, for maturity) and then will drop again. So that field isn't a good way to see if you're staking. In your transaction fields, you'll see stake rewards as transactions (if you've staked).