In early season, my feeling is Lin thought too much, sometimes either gave up the ball very early or held the ball at the top and waiting for picks. Now, in the past 3 games, he's been pushing the ball really hard, and whole game was in uptempo, that's how they ran Memphis out of the gym. That's how they are now the NO.1 scoring team.
As I mentioned earlier, both him and Harden said, they are learning playing off each other, without the ball. They are showing progress and promise.
It's a physical game, and it's full of variation during game time, so normally it's not decided by one move of one player or one order from coach, it's usually a combination of lots of things.
