What does that have to do with your previous post about crits? The TdF is an average speed over 3 weeks of riding over various terrains and believe it or not the goal of racing is not to go as fast as possible, it's just to get to the end first. The average speed of the tour really has no bearing on the question of how fast is fast, as fast is much faster than that.

But more importantly, I want to know from where you pulled that "quote" before.