Just watching the re run AGAIN on sky, and have just noticed you can still access the 9! camera angles,
I was watching the onboard speeds at the end of the pit straight
The cars i saw were as followed
Webber 304kph with DRS on the limiter
Maldonado 309kph with DRS on the limiter
Ricciardo 309kph with DRS on the limiter
Vettel 304kph on the limiter
Perez 310kph with DRS on the limiter
Hamilton 314kph with DRS on the limiter
Kobayashi 304kph appeared DRS was failing
So i would say IF Vettel has caught Lewis on track, he wouldnt have passed him, Vettel only passed Rosberg (a very good pass) because he had great traction out of turn 6/7.
Also, IF Lewis was able to use DRS after the safety car, he would have passed Vettel easy and been able to make use of the fact the Mclaren got heat into its Tyres much quicker.
Although the DRS for a second year, didnt seem very effecting in Oz.
Roll on Malaysia.