One thing I have observed is that you generally prefer a batsman didn't attempt to smash from ball one. It still proves unnecessarily reckless, even in T20. Even if they come in late, you would rather they turn the strike over to a set batsman. Of course there are a couple of reasons why you might need them to go all out, but it is not the way to play as tends to be the idea. It's a game of small differences, like how the difference between bad bowling and good bowling figures is only two or three sixes. If you were talking in a Test context, then yeah, attacking your 10th ball for a six would be quite cavalier, but in T20 that means you've taken your time.
David Hussey on Sunday made 11 from 11 before opening up in the next 7 balls to make 27. On Friday, in much cleaner batting conditions he made 9 from 10 balls before embarking on a rampaging 88* from 44. The hallmark of that innings was that he never over-attacked. He was simply looking for the ball to hit big each over and pressing conventional runs in the mean time.
Look at Warner on Friday. Scored 13 off 13, before going on to make 38 from 29. Robin Peterson on Sunday took 19 balls to score at a run a ball, but finished with 34 in 27, which is a bit of an 'anchor' innings, but above the average scoring rate of the match; in any case a T20 side can still use guys who keep the run rate going at better than 7 runs an over. van der Merwe was the player of Sunday's match with 48 from 28 balls. However, he started his innings with 15 from 17, before splattering Nathan Bracken all over the cheering fans.
What we learn from just this small set of examples is something of a common strategy for getting a nice number of runs, based on attacking through conventional singles and trying to push the run rate at a sustainable rate, but then expanding by looking for better balls which can be exploited. Of course, batsmen will always eat up half volleys and the like, but somewhere along the line a decent ball must be destroyed and that incurs a much greater risk.
It's mathematically sound. If you score 10 runs from 10 balls and hit the 11th for 4, you increase your scoring rate by more than a quarter and actually hitting the 11th ball out of the middle is much more likely than the first or second. Batsmen can afford to space out their big risks or concentrate them. Even in the reduced time frame, it's still a game where a little patience pays off.