Just newspaper talk. None of the trains on this route have been cleared for more than 110kmph. Probably reported by an enthusiastic journalist using a speedometer app who just looked for the highest speed number shown in the app and reported it.
LP's don't over-speed by 20kmph to 'make up for delays'. Overspeeding is an issue that the railway takes very seriously and LPs don't over speed at any cost (Usually when they do, the consequences are not so pleasant).
As the...
more... first part of the article clearly mentioned, SR is yet to take measures to regularize 130kmph operations on these lines.