ThorZain is just not capitalizing on his lead each games, he does quite a decent amount of damage, but then DRG superior multi tasking lets him pick off ThorZain's slow crawl each and every single time.
Although if ThorZain takes his training seriously with SlayerS and dedicates the hours necessary, his multi tasking and micro will surely improve over time, and with the strong macro he has, should really do really well in the near future.