In Machida's last two fights, we have seen what happens when someone tries to be the aggressor(Thiago) and when someone tries to be a counter-righter(Evans), both had the same result, Nasty KOs.
For a second there I though Rashad was actually willing to take some kicks from Machida in order to time them for counters. With two counter-fighters, sometimes the early rounds can be deceiving as far as what you think you see taking place. However, Machida saw his opening and took no chances and put Evans away as soon as he had the chance. Watching the fight again, Evans basically looked out on his feet, or at least rubbery-legged even before that final flurry he took up against the cage.
I think the only remaining question is, what happens when someone finally does make contact with a good strike to Machida. Other then that, he is not showing any holes in his game.