Stealth don't do much when there's only three routes in and out. You effectively have a neon arrow pointing to your position.
Speed on the other hand... I've made more captures dodging bullets than really should be allowed. I can't tell you how many times strafing and sprinting at the same time has led to me being called a speedhacker as people don't have high enough DPI mice to keep up.
[Sprint to the left. mice run into keyboard. Cursing ensues and hackusations begin]