CPU was stated above, Core 2 Duo T7xxx at 2GHz.
Keep in mind that these files are real content, not anime. Anime decodes much faster.
For example, a 720p MKV gives me 181 fps. If you extrapolate that to 1080p, that'd be 80fps.
Anime is a joke load compared to movies, and has much more variability (this is the reason people complain when the intro in some show desynchs, or when a rain scene kills them - Sudo's DTB ep6 IIRC comes to mind - you just got to a part where most of the picture actually changes every frame, and the bitrate went from 2Mbps to 6 or so; my sample was high in the 20s).
I just tested with mplayer-svn on the same machine, in benchmark mode. It got an impressive 22 fps on the second sample, bit it still doesn't match single-core CoreAVC, much less dual-core.
A quad core machine would only exacerbate the difference.