When I mine in pools there are unconfirmed coins, but it seems unconfirmed times are far less than immature status in *coind wallet app... Any advice how I can get my coins quicker instead of waiting for 100 blocks to pass?
I'm still not completely sure that I am understanding your question correctly, but let me take a guess.
As you know, when a block is first mined, the coins from its block reward are considered "immature". They may not be spent until 100 blocks later, or in other words, until the coinbase transaction has 100 confirmations.
Now, there are a couple of ways a pool can make payouts to its miners.
When creating the block template for mining, include a coinbase transaction that pays appropriate amounts to all pool members who are due to receive payouts.
Include a coinbase transaction that pays its coins directly to a wallet controlled by the pool operator. The operator then makes additional transactions for payments from that wallet (or another wallet he controls) to the pool members.
For a pool that uses method 1, members will receive payouts that are immature, and they will have to wait 100 blocks to spend them.
For a pool that uses method 2, if the pool operator has a sufficient balance in his wallet, he can make the payouts right away by using coins that have been in the wallet for a long time already, long enough that they have become mature. In this case, the payouts are ordinary transactions; they confirm like any other, and the miner can spend them immediately (or perhaps after 1 confirmation, depending on the requirements imposed by her wallet software).
Method 2 is certainly more convenient for the miner members if all goes well, but it has some other problems. In order to maintain a sufficient balance, the pool operator has to keep some of his own coins in the wallet at all times. These coins are then tied up there, which may be inconvenient or costly for the operator. Also, if the block reward is paid directly to the operator's wallet, there is a chance he will decide not to make the payout to members, but instead will keep the coins himself.