Tint v. Tint: why linear in WB and polar in Enhance?

Question

I'm actually interested in the more general version of the question than the topic title indicates.
Why is the White Balance controlled by two sliders (Cyan<-->Yellow, and Green<-->Magenta), whereas the Tint controls (in the Enhance Brick) are controlled by single planer hue/saturation pickers (a/k/a color wheels)?
Why is Cyan<-->Yellow "Temp"?
Why is Green<-->Magenta "Tint"?
Bonus for reading:  Did you know that you can make the eye-dropper for WB (and for Enhance→Tint) dynamic?  Use "{Shift}+drag". 

Answer 1

Follow up and just guesswork - the manual does not disclose much about the algorithm.
Why two sliders in the white balance controls? The color temperature can only describe those light sources exactly, that can be modeled as black bodies, emitting light according to Planck's law. Our sun and most of the stars come close to this model.  But for most real world lighting conditions there will be discrepancies, and the second slider to fine tune the tint will help to compensate the remaining tint of areas that should be white.
Why is Cyan<-->Yellow "Temp"?
Guesswork: The color temperature corresponds to a pure spectral color defining the hue of a lightsource. The above slider shifts this color along the rainbow colors from Cyan to Yellow (I would have expected Red, but perhaps you are not supposed to take pictures in red-light districts ).
Why is Green<-->Magenta "Tint"?
In the color wheel are Green<-->Magenta and Cyan<-->Yellow (nearly, should be Red) complementary colors, and the line Cyan<-->Yellow line is nearly perpendicular to the line Green<-->Magenta, so with those two  linear controls you can span the full color wheel and define the same color adjustments as with the color wheel in the "Enhance" tint controls.
What do you think? Hope this time I managed to at least address some of your questions ...
Merry Christmas
Léonie
OT: Lion - Just in case you did not read about this - when you install Lion, the installer disk image will be deleted from your machine as soon as the installation is complete. So it is very important to copy the installer to a safe place before you start the installation. Otherwise you cannot create a bootable disk image, and you may need it later , see https://discussions.apple.com/message/16899879#16899879
My chrismas greeting: A beautiful christmas star, Albireo in the Cygnus constellation, a twin (triple) star with striking colors corresponding to the color temperatures 13200K and 4080K. Get out your astrolabe and the binoculars and look at Cygnus Beta  (the head of the swan, the northern cross, half way between Vega and Atair).