Quote from: Robin_Good on September 28, 2014, 04:42:20 PM

I don't understand why people think shorter block times are better. It only means you need more blocks for the same security, thus meaning the block chain just gets needlessly bigger. Many Bitcoiners understand that, but many Altcoiners don't want to understand that, because that would mean their Altcoin has no advantage at all.

False.
Assume a bad miner controls 25% of the network.
Coin A has a 1 minute block time
Coin B has a 10 minute block time.
After 2 blocks, there is a 1 in 16 chance the bad miner can double spend
After 3 blocks, there's a 1 in 64
After 4 blocks, there's a 1 in 256 chance.
4 minutes with coin A for that chance, 40 minutes for coin B.