umm, it took Anderson 4.5 rounds to win the fight. he didn't win the fight in 10 seconds.
also, tapping isn't the worst way to lose a fight. tapping is smart if you are caught in a sub. the worst way to lose a fight is to not only lose, but also get injured bc you were stupid and didn't tap (see big nog).
regardless, a win is a win and silva won the fight.