Well he is a turtle, no doubt about that.
A turtle with the highest football IQ in the world
He might be a turtle in sprint but certainly not in football. Because in football and more so in any variant of Total Football it is not about how fast you run, it is about how fast and precise the ball is communicated among your teammates and finally towards the goal. In that sense, Busquets is one of the fastest footballers in the world.
People hyping up Isco should remember how Busquets dominated him in the home classico last season. Isco can run, dribble, tackle all he want. But it took Busquets just 2 small movements to make Isco look foolish.
"In a football field, the football is the fastest player. That's why the ball should be the protagonist. In that way, even if the players become tired, the tempo of the game would not be affected as long as the speed of the pass is maintained."
- Johann Cruyff