No new text tones in iOS 4.2 for iPhone 3GS -- why?

We mentioned this back during the betas, but it's worth a mention again as many iPhone 3G and iPhone 3GS owners out there finished their iOS 4.2 update yesterday only to discover something missing -- the new text tones! Yes, for some reason Apple has chosen to only make those available on iPhone 4. No iPhone 4, no new text tones.
But why, you ask? We're wondering the same thing. We know this can't be performance-related, that's for sure. This makes us curious about what an email response from Steve Jobs would look like on the matter.
(Not that the new text tones are anything to write home about -- check out the video after the break if you want to hear them in action.)
Any iPhone 3G or iPhones 3GS owners out there feel left out in the cold and care to speculate?
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Andrew Wray is a Salt Lake City, Utah based writer who focuses on news, how-tos, and jailbreak. Andrew also enjoys running, spending time with his daughter, and jamming out on his guitar. He works in a management position for Unisys Technical Services, a subsidiary of Unisys Corporation.