Well, its now a fact rather then conjecture - black computers are faster then beige (see below link). So its no stretch of the imagination that Canon purposefully handicapped the Rebel on yet ANOTHER level... I know that some of my friends in Korea and in Moscow are working on a instant color correction kit achieved just by changing 3.35 bits in the firmware... stay tuned. 8)
http://www.dansdata.com/black.htm