Ok, just redownloaded the game, just for you folks to see if I am delusional or something else is going on.
Code:
Frames	 Time (ms)	 Min	 Max	 Avg
 3154	   60000	  46	 70	52.567
This is what fraps showed me.
If anyone of you want frame by frame numbers I can send you a file.
This is 6970@stock on thuban@3.8ghz with 8gb 1600Mhz cas 7 ram with velociraptor and win 7 64bit
I don't know what those guys at that website were testing but clearly there is some bottlenecks. And my system has 44 days of uptime and had chrome up with dozen tabs open, Origin doing god knows what, winamp, skype running.

Also I have little something something for Mechanical Man:
http://www.youtube.com/watch?v=A-enG0JCIH8
If that is not using all the cores, I have no idea what is :/ In my books 'using all the cores' means they are all loaded and being used. I am sure BD 8 cores will be used the same way.
besides, i was playing one map without any heavy machinery or explosions, though heavy fight. I believe that in that Alpha version they also have some of the frostbite features disabled.