Here's my results from a fresh restart:
CPU: Intel Core 2 Quad Q8200 @ 3.33Ghz (1904Mhz FSB)
---------- testing started ----------
testing x87
Starting matrix multiplication loop...
Elapsed time: 3152 ms
testing sse1
Starting matrix multiplication loop...
Elapsed time: 2698 ms
testing sse2
Starting matrix multiplication loop...
Elapsed time: 2387 ms
---------- testing finished ----------
(Looking at the above posts SSE2 does seem alot better on Intel then AMD, odd.)
I've been watching the beth forums for ages and this mod is just awesome, benchmark details below

Fast Travled to Markarth.
Vanilla: 33 FPS (http://i43.tinypic.com/z0s5z.jpg w/ FPS Counter)
SkyBoost R3: 44 FPS (http://i41.tinypic.com/mkbper.jpg w/ FPS Counter)
Very NICE work Alex, can't wait for future releases. Maybe there can be two versions? x87 for AMD and SSE2 for Intel, just a thought.