Speaking of low graphics setting, everyone in professional gaming played their games on low setting since it made spotting enemies MUCH easier. Though I have not played BC2 on PC with low settings so I have no idea how that works out, but until 2142 low setting was the way to go.
Then the competition regulated that you were required to use at least normal setting so that hiding and camouflage was relevant, with addition of spot restriction.
On low settings, people hiding in grass, thinking they are well hidden, were fully exposed making them look like idiots for enemy sniper to line up a head shot. LoL