BF2S Forums FPS ... current vs. average

..so if this is true:

renderer.drawFps [0,1] - Displays the current and average frames per second (FPS) in the top left corner.

Then that means the left number is the CURRENT FPS and the other is AVG FPS. But... Shouldn't average be more consistent the longer it is running?
ALso... if I read mine every second it would read:

20/50
23/45
26/41
15/66
37/28

Does this look like the average should be anywhere NEAR 40? Not one of those CURRENT figures is higher than any of those AVERAGE numbers.
So...does ANYONE here actually know for sure?

Most importantly...is it safe to say that my frame rate is about 20-25 or is it about 40-45?