Originally Posted by hopperja

Slow is relative. If compared to a racing bike, the LHT will be slow because:
1- it's heavier
2- gearing is completely different (the steps on the racing bike will be biased toward racing/smooth pedal stroke whereas on a touring bike a wider gear range is desirable).
3- the head angle will be more slack = increased rake/trail = greater tendency to self steer = slower steering input but more stable. Compare riding no hands on a race bike vs. a touring bike and you'll find the touring bike is noticeably easier.
4- more upright riding position = more wind resistance created by the rider's torso (think of the torso as a big sail catching the wind).
5- the LHT is going to have wider tires, perhaps 1.25+ wide, and will be generally run at lower pressure. Even the 32c Schwalbe Marathon is typically run at 95 psi or less. A racing tire will be narrower (less wind resistance), run at higher pressure (less rolling resistance), and have less tread (less rolling resistance).
6- the LHT will have a longer wheelbase = longer turning radius = slower turning