I wouldn't be too concerned Harry about an advantage.
There was only 3 of them doing full laps and they did maybe 5 laps each on the final design? I was driving my Touareg! and only was only driving it through the high speed S section on the back straight. (I never did a full lap even as a passenger. I never even went onto the bank - but I have driven it back in 2006)
So given a) the track will be fairly different with water barriers to what it is with witches hats, b) the track will be different to the test day - it was more a concept design day to an exact lay-out design and c) everyone will do probably 20-30 laps before timing even starts I wouldn't worried about the guys who did a few laps having a huge advantage.