@KevinJ. Thanx for the info, and whatever the outside temperature and other conditions:
German carmag AMS tested an F30 335i sportline 0-62 in 5.1 seconds.
My F30 335i is just as fast as my ex my 2007 N54 335i but even has a better sound/brakes and chassis to it.
Whatever the outcome and until the M3 arrives, or if there's an upgrade of the N55 etc., in this segment the F30 335i sportline is the real sports sedan as BMW advertised.