I believe CAT is not a very tough exam like IIT-JEE which requires in-depth knowledge of core subjects. The standard of syllabus is simple school level Maths and English. Since most of the techies are people who have done well in school, I do not see a reason why they should think it is tough. I think it is more of the perception about CAT which is a problem. Enjoy your preparation and attempt the exam with an open mind. It is just another exam you are writing and not Zaphoid Beeblerox's biography. So, just keep cool.