According to the annaunciations of RIOTS, jungler income will be great improved in S3. So we did the following test to see the differences betweent S2 and S3 jungle.
We picked Dr.Mundo to do the test for 20mins pure farming in the jungle.
season S2 Mundo
gold per minion（with ambient gold）：33.92
preseason S3 Mundo
total gold: 4858
gold per minion（with ambient gold）：32.72
As we can see, the profits of S3 is not better, not even close....it is 400 gold distance between S2 and S3.
After that , we did more testing on other champions.... Kyle get a better jungle farming results.....but still no better than S2
preseason S3 Kyle
total gold: 4941
1: Heart of Gold is a stable income of a jungler in S2, and it was very very popular for S2 jungler.............and now , it is gone...
2: The value of jungle creatures is slighty improved , but he HP and damage of these creatures are also great enhanced, especially the camp boss.(A smite can not cost half HP of the big ghost )
3: RIOTS said it is possible for jungler to carry the game because of the jungle adjustments in S3. As we can see , if you just keep farming without ganking in S3, you will not be able to get more than S2, so how can you carry the team?
(We did the test on China sever)