Yeah that was my point too.
I got speeds of 150+ while travelling in Patna Rajdhani and SK. Needless to say, these are nowhere close to the 130mps of the route. Even 133kmph shown continuously for 10-15 minutes was fake.
I had a good chat with LP of SK few months ago and he told me that Overspeeding is STRICTLY Prohibited( not even of 1kmph).