- Moving with pistols, knives, grenades, etc. are all the same fast speed.
- When moving backwards you move at 75% normal speed.
- You make no sound (at least, none audible to yourself?) when moving less than 100 units/sec.
- The "walk" toggle key does nothing useful--it just slows you down to the speed of crouch without actually being crouched.
Classes' base speeds (with pistol, knife, grenades, etc.) and sprint speeds.
Recon base=170, sprint=229
Assault base=136, sprint=217.5
Support base=136, sprint=N/A
So Assault is no faster than Support, they just have the sprint key.
Weapons slow each class by a proportional amount. For example, carrying the SRS as a Recon or as Assault brings to to ~85% of your base speed.

