WArner, for all he made his first strides on the international stage in the format, was never a T20 player - even in those early forays, he was hitting his boundaries with proper cricket shots and decent technique. Eergo, whilst he'll never be as easy on the eye as, say, Michael Clarke might be, his successes at the top level are no surprise and the product of good cricket.
Does that mean that the like sof Finch, Hales, Roy etc will naturally be able to do the same? I'd say not - Hales struggles against the moving ball, Roy lacks the defensive technique and Finch...well as he did for Yorkshire last season, its interesting that he did it batting at six - that is to say, Jason Gillespie felt that he was less likely to succeed early on than Jack Leaning (a 20 year old with three first class games) and Jonny Bairstow (a wonderful player with a very noticeable flaw in his game)