What was the difference in practice times between Fri and Sat in 2004? If the circuit is really dirty on Friday, the cars are going to be pretty unsettled regardless of aero or mechanical grip changes due to the rules. I would think as the track gets faster, the difference between 04 times and 05 times will get larger.
OK, re-reading that, did I get my point accross? The dirty track is kind of an equilizer between 2004 spec and 2005 spec much in the same way a wet race is an equalizer between strong teams and weak teams. Or maybe not, just a thought!
