I was kinda wondering that myself. It's been asserted that the process doesn't bleach the plastic, just reverses the oxidation (or whatever). So an item that's intended to be slightly on the yellow side will only come back to the original color and not fade out too much?
And, yes, The A][, ][+, ][e are slightly yellowish straight from the box, unless it's a Platinum. The //c is snowy white.
--T