1) Home Advantage - Sponsored by The Doctored Monitored & Altered Groundsmen of BCCI
2) Had Royal Patronage from Former Test Captain - Mahendra Singh Dhoni
3) Opposition is already Psychologically on the Losing side - Since they know it will Turn Big only when they are Batting and Not Turning While India bat.
4) Crowd & Media Support is also Heavily in India's Favour and this further adds Pressure to the Visiting teams.
5) He has an able Mentor - Anil Kumble who would have added more Skills to his existing Spin technique.