Yet some coins seem much faster to give confirmations.
Fast confirmations generally mean that less hashing power is required to make the confirmation. Therefore those confirmations are not as sure as a bitcoin confirmation can be considered to be.
I've seen the same debate between Litecoin and Bitcoin. Litecoin has a faster confirmation/block time. That means that litecoin confirmations are not as sure, even if the same hashing power was involved.
Some exchanges have required up to 100 or so confirmations for some coins before considering the transaction as valid.
So it may seem that Infinitecoin is "faster" but it's just how things work.
0 confirmations is probably OK to accept payment for a can of soda, whereas you might want to wait for more confirmations in other cases.
A downside of having a fast block time (faster confirmations) is that the blockchain for that coin will grow faster.
Anyway that's my understanding.
ps: Infinitecoin is still cool
