When showing those charts and making a recommendation, you have an obligation to show the text immediately preceding the AMD chart:
"The most frustrating part of putting this comparison together was spending a full day troubleshooting AMD’s multi-GPU issues. After swapping out power supplies, graphics cards, SSDs, fresh Windows installations, and motherboard slots, there was simply no rhyme or reason to the number of problems that prevented me from running a dual-GPU card or two single-GPU boards. Then came the idea to trade out memory kits, which actually ended up ameliorating some of my woes. Instead of crashing upon launching the game, CrossFire-based setups crashed when I changed settings at the end of the run or when I’d load up a level.
After a long night of restarting Battlefield 3 after every resolution change, I finally had results for four different card combinations: two 6990s (quad-GPU, yay), 6970s, 6950s, and 6870s. "
Personally, I wouldn't dare advise someone to make this kind of choice specifically for BF3 today without mentioning it.