Penryn MacBook Pro SATA speed limited to 1.5 (capable of 3.0)

So I understand the recent uproar over the newer MacBook Pro's lack of SATA II speeds (when the hardware clearly supported it), and Apple released an update fixing it. But now I've suddenly just noticed the same thing with my early '08 MacBook Pro. System Profiler is showing the Intel ICH8-M AHCI with a 1.5 Gigabit speed. This chipset can support 3.0 Gigabit, so why Apple, what's your explanation for only providing a fix for the newer MacBook Pros?

Can it be assumed that you tried (possibly, without
success) to download the updater a second time?
Brie Fly,
I tried it a second time when it was the stand alone app in the software updater and it worked. Thanks!
Big presentation on Tuesday to some of the Marines at Camp Pendleton. That was my impetus to upgrade to the MacBook Pro. To be honest, this is the first problem I've had with it. I love the machine otherwise.
Dual 2.3GHz G5   Mac OS X (10.4.5)  

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