By "first touch" here, I mean how well a player handles the ball when he/she receives it from a teammate, it does nothing to do with ability to dribble. It is just a very subjective feeling of mine that Iniesta always seems to be able to handle the ball so well while sometimes when Messi is fed with the ball, he would kick it a few more yards away than where it should be for him to comfortably possess it, which ends up giving away the ball. Again, just my very subjective feeling.
The other thing I noticed lately is that Messi tends to pause a bit before he shoots, perhaps trying to find the best angle or something. I thought that would make his intention more predictable and easier for the defenders and goalkeeper to close up the angles.