He said multiplayer. Single is probably fine with a good quad, but multiplayer at 1080 or higher is supposed to demand the best rigs. Kinda like WoW. Most systems can handle it just fine, but if you want to do 20+ man raids you are going to need more then just a basic system.
Yes he meant a quad core is fine in multiplayer but a dual core might not necessarily.
yea surprisingly i cant find a good battlefield3 multiplayer cpu reviews. i figured this would have been done on most sites by now. i did find a german site that shows a bunch of cpu's. the i3-3240 being decent probably because of the hyperthreading.