This research has been carried out in order to evaluate the contribution of agile marketing methodology, which is considered to provide the highest quality product in the fastest possible time, in the environment where competition and market conditions are very tough. To obtain comparable findings, an empirical study was designed in a telecommunication company during the development of a new mobile internet campaign. The same campaign was run simultaneously with two different approaches; conventional waterfall model for prepaid plans and agile method for postpaid plans. As a result of the study, agile method provided 33.2% improvement in time-to-market while letting go live after 9.2 days, the latter lasted 22 days. The results revealed that in addition to responding quickly to customer demands, agile approach increased the efficiency of marketing operations.