So this type of info now seems quite relevant.damager21 wrote: Following are the fastest laps set during pre-season test at Jerez from 2010 to 2014
http://e0.365dm.com/15/01/660x350/faste ... 0127094852
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A 1:20.9 on medium rubber implies to me that at least a high 1:19 should be possible on softer rubber - particularly given the temps where it must be hard to get harder compounds up to temp. Not to mention that I'd be surprised if the Ferrari has done its fastest time of the test + it's still likely the Merc is capable of something quicker (said as a Ferrari fan).
So I think it's reasonable to suggest that they will already do a time faster than was achieved in 2011 and may get close to 2010. Both of which, imo, would be quite remarkable.