I would suspect those people with 1000$ monitors to have 2 cards, since those fps are not playable.
"In our testing so far, we have found some stark differences between SLI and CrossFireX gameplay, at least in this first mission of
BF3. While the above graph shows similar performance between GTX 580 SLI and HD 6970 CFX, the graph does not reveal a gameplay distraction we experienced with Radeon HD 6970 CFX. This distractionsdid not appear with GTX 580 SLI, or single-GPU video cards.
We experienced stuttering and jerky behavior with Radeon HD 6970 CrossFireX. I wouldn't say that it is "MicroStutter," it is outright "stutter" or a "jerky" feeling as you play. As you move through the map you can see and feel that it is not smooth, not consistent, and you can visually see this as you are walking. There is a lot of straight line walking during the first few minutes of the map, and it is very easy to identify and breaks the immersion of the gameplay.
We started with the GTX 580 SLI and experienced smooth gameplay, and then when we installed HD 6970 CFX to compare performance the constantly laggy experience was immediately noticeable.
The jarring behavior is so bad that it is distracting to gameplay, and is not a configuration I would use if I were playing BF3. After having used both GTX 580 SLI and 6970 CFX in this first mission, I can easily say GTX 580 SLI is the better experience and what I would use when playing. AMD has a lot of work to do with CrossFireX, while the performance is there, the smoothness and consistency is not even closely competitive with SLI configurations. Now, it could be a simple in-game graphics option that is causing the issue, but it is something we will have to look at closer as we play the game more.