^^^Not so much from what I read. 
Every circuit has an aerodynamic efficiency to drag ratio. If you beat that ratio you go quicker, if your car falls below that ratio you will struggle. Generally you will design a car to perform on the majority of tracks and ignore high-downforce extremes, like Hungary and Monaco, and low-downforce extremes, like Monza.
That quote merely confirms the point that aero efficiency is a key element of a good car...
I assumed it meant aerodynamic efficiency was half the battle. Not saying it's not a key element.
Also, I'd mentioned about car wheelbases before. Apparently the the wheelbases don't differ too much. With McLaren and Ferrari having the longest, Red Bull somewhere in the middle and Virgin having the shortest. But details are scarce. But none the less it will make somewhat of the difference between the cars from race to race this year.
Still a while till the first race though. 24 days seems such a long time to wait.