Let's benchmark !
I used IntelBurnTest v2.4, which takes advantage of the linpack benchmark engine.
Get it here:

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Here goes the numbers for the rigs in my sig:
Rig 1 (Intel Q6600) standard test: 34 GFLOPS (average)

~update~
Rig 2 (Athlon64 X2) standard test: 6,40 GFLOPS (average)
Laptop (Sempron) standard test: 1,45 GFLOPS (average)
Wow... My quad is arround 24x faster than my old lapcrap...

~update~
43.5 Gflops after installing the new cooling system (stable @ 3.4 GHz )