Red Bull are slow at the end of the straight line but they are the fastest to reach high top speed because their awesome traction and short gearing. I would love to see a comparaison with all the car from parabolica to the first chicane, i'm sure the Red Bull is the fastest car to travel the main straight.
Two years ago, despite their low top speed, they had the higher top speed of all teams at the finish line.
This. They can probably carry more speed at the start of the start-finish straight, and with DRS open during a race, they will go past anyone anyway. Especially when the car ahead of them won't be able to use DRS