Haven't had too much problem as host when I've been host, I have been clipped around the corner from time to time when I tried to run around the corner but that's understandable, with CSHD and all. But generally if I am host, I win the 50/50 battles up front when both him and I are shooting at each other.
Yep. A fast connection is usually to your advantage. You're getting your shots counted by the server faster...because you ARE the server. Your reaction time is increased significantly. You basically have half the lag of everyone else. Give me the chance to host and I'll take it.
Host has an advantage in any back and forth firefight that takes place more than half a second after someone rounds a corner. Host is the guy most likely to nail someone before they can get into cover. Your hit detection is the most reliable. You're not a god like you would be without CSHD, but you're still pretty boss.
I've noticed it's a lot harder to tell who's host since they actually reflect the artificial lag with the bars if you're serving up a sh*t game... I suspect a lot of people bitching about host disadvantage arent actually the host.