An update on where we are on fastest times with a little over two hours remaining: Massa (Ferrari) 1:11.722, Kobayashi (Sauber) 1:12.056, Hamilton (McLaren) 1:12.368, Rosberg (Mercedes) 1:12.899, Barrichello (Williams) 1:13.377, Kubica (Renault) 1:13.369, Buemi (Toro Rosso) 1:14.862. Remember, though, that the headline times don't necessarily accurately reflect the competitiveness of the cars because of varying fuel loads, although it has to be said that Massa in the Ferrari has very obviously been impressively and consistently quick for the whole test so far.
With reverting back to no fuel stops, is it correct to assume same rules will apply regarding teams using their own witches brew concoctions once again? A quick google results in nothing to the contrary to dispute it.