Well I would be surprised if somebody was to choose a piece of equipment based on such a criteria, now nothing exits in a vacuum if a competing product exists offering the same functionality and overall performance for the same price I would also be surprised if someone does not choose the later system.That was a troll...
Choosing between the 360 and the PS3 was not about a power brick, the PS3 for a good while was more expensive, games were not running as well, etc.
The 360 power brick is a pain in the ass if you ask me, so is the one for my Alienware (way tinier though), I hate them but I've to deal with them.