Shanghai - Will it favor the McClarens?

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Its no secret that the McClarens have a straight line speed comfortably more than even thier closest rivals, Probably due to the F-ducts that the driver can control to chanel air to the back of the car. Given Shanghai has very long straights, I think the McClarens have an advantage even though obviously all the teams will be tuning their machines to adapt to the race conditions what d'you guys think?