Centuries are no longer a rare feat:

In early years of the T20 format, 30 used to be the new 50. And 50 became equivalent to a century. 100s were very rare. Even in a competition as long as IPL, a batsman was satisfied to post a solitary century. Expecting anything more was like asking for the impossible.
Kohli has destroyed this mindset. In IPL 9, he hammered four centuries – 100 vs Gujarat Lions, 108 not out vs Pune Supergiants, 109 against Gujarat Lions again and 113 vs Kings XI Punjab. Unbelievably, the last ton came in a rain-curtailed 15-over-a-side match. Thanks to Virat Kohli, century is no longer a rare T20 landmark.