How DSLR auto mode parameters differs

I always think of the auto modes in my DSLR and how they differs in the mean of parameters (F number, shuter speed, ...)
so i did a quick test using my D90 and if you have time to do it please do it and send me the result
Camera: D90
Lens: Nikon 18-135
Test description: take the same shoot with all the auto modes and compare the parameters
Results:

Mode	Flash	F	ISO	Shutter
Auto	yes	3.5	800	1/60
Portrait	yes	3.5	800	1/60
Landscape	no	5.6	800	1/8
Close-up	yes	5.6	200	1/125
Sports	no	3.5	1600	1/30
Night portrait	yes	3.5	800	1/15

from the table i see that auto-mode assumed it's a portrait photo