I was told by an extremely reliable source that Lotus' fuel tank isnt big enough either and they werent expected to finish in bahrain, not sure if they turn the engine down to finish maybe?
I'm sure virgin could do the same if they turn the engine down, better to do a race distance at this time for them i'd think.
As Aus, the practise seems to have given us no idea again as to who is quick, but i reckon it could be Webber, Hamilton and alonso for top 3