Yes, I confirmed it with a friend and it appears that the zero attendance policy at BITS Pilani is true. My friend claimed that this policy helped her in many ways. She tried attending classes initially but failed to do so as she found them to be boring and monotonous. She however attended the lab sessions and some physics classes which she found to be very intriguing.
The only disadvantage she faced was the surprise tests which she would often miss because of not attending classes. The simple solution for this is to ask one of your friends who attends classes to inform you if they feel the professor is about to conduct tests. But some professors still did not let her give these tests so she had to solely rely on her mid-semester and final exams.
Overall, she has no regrets for skipping classes as she feels she did quite well even without them and also saved a lot of time in the process.