Think in this way tallg ...it will take less than 4 hours to travel from California to Washigton.. but it takes 12 Hours to reach from Doha to Washigton ... did we ever blamed that Qatar Airways or any other flights flying from doha to Washigton is slow .. this is the same case for you internet traffic as well ..even if there is no congetion ...there is an obvious delay for the packet to reach the destination and come back .. which we cannot change ...because it is natural law ..