i think tejas anyways has very high priority over rajdhani as well. If it OT VB, then that would have been a news. But a Tejas/Gotiman/VB overtaking a Rajdhani is not so surprising. Note that if HWH raj was overtaken, then that means Raj was late and out of slot. In that case, operators gave preference to the train that was running on time. This is the practice for normal trains as well.