I have always said the self belief in JEE exam is the most important thing. If you have confidence that you can crack IIT then 1 or 2 years doesn't matter anything. Its a matter of your life. This decision will be reflected on all your life.
You know what, i got to know about IIT after my 12th board exams. But when i start studying about that, I had confidence that i can crack it one day. I took two more years ( after 12th i dropped ) and i went to IIT Delhi. And, today I am proud of myself that i took that decision..
Best of luck
PathFinder
Technocrat
IIT Delhi, 2004 Batch
Currently in Student Counseling & s/w Industry