Yes it's true. 6316B was using lane 3(or 4), and the 969 used Lane3/2/1 and overtook my bus. Plus 6316B jams all the way, even after Yishun svc exited. SBS9404R also overtook 6316B, by using road shoulder and cutting tru at the spot where TPE links to SLE.
Anyway, incase u aren't aware, the bus hit expressway at 6:10, 5-6mins later jam all the way and Svc 969 takes 20mins on expressway, 30mins on road. And SBS6316B reach WRI at 6:51pm~