My god everyone who say earthcoin obviously are very new to this whole crypto thing or are fanboys.
Transaction time and confirmation time are not the same thing.
To answer the question worldcoin is the fastest. 30 sec confirmation time is needed or else there would be orphans.
Watch out for coins like earthcoin, it is a huge premine. Worldcoin is a coin that exist for a relatively long time, it works very well.
Also google scharmbeck or see here https://bitcointalk.org/index.php?topic=397267.0 what is worldcoin getting that no other altcoin has.