Actually, your transaction's priority is the sum of your inputs age multiplied by their value, then divided by the size of the transaction. As you can see in blockchain.info, your transaction contains many dust "inputs". Although many are from the same address, they still add to the size of the transaction. As a result, your transaction will have a small priority value. But if your transaction is small, and your inputs are old, they will get confirmed very quickly, even without a fee. For instance, my 1 input, 2 output transaction (~1.1 BTC value) was confirmed in the next block, without any transaction fees.
How do you figure that? 0.45 is not a small amount and the fee of 0.0001 is now the default fee in bitcoin-qt so it is going to be the new "standard" fee.
but just because it's "standard" doesn't mean it bypasses the fundamental rule of fees: the higher fee per kb, and higher the priority, the more likely it's going to be included in a block. Keep in mind that if 13 cents in fees (0.001 BTC), your transaction will almost certainly be included in the next few blocks.
