Except that the problem may only affect the fastest SSDs under rare situations. When the original unibody MacBooks were under development these types of drives were practically non-existent. For example, the OCZ Vertex drives didn't begin shipping until Feb/Mar 2009 so these drives have only been available for a few months (although the more expensive Intel X25-E drives have been available since last fall). By limiting the SATA speed to 1.5Gb Apple may be trying to prevent problems that happen only with these faster drives. In fact, it wouldn't be unfair to say that the entire industry has been caught somewhat off guard with these super-fast SSDs.The old unibody Macbook Pros used the exact same chipset and the exact same optical drive, and there have been no reports of any problems.
You're suggesting Apple replaced a problem that no one has ever noticed with a problem that everyone is noticing? Doesn't sound logical to me.
As for my suspicion being a "problem that no one has ever noticed" under the conditions that I've proposed it possible that VERY, VERY few could have ever noticed. The scenario may be something like writing large blocks of data to the SSD while simultaneously reading/writing to a DVD/CD. That's probably a condition that happens fairly rarely but even if it was rare it would be pretty bad if the result was a corrupted SSD.
But, once again I'm NOT claiming that this is the reason why the newest MacBook Pros are running with only 1.5Gb SATA -- it just seems to me that this could be one of the more plausible explanations.
Frankly, if Apple doesn't address this issue with a simple firmware update then we can be fairly certain that there IS/WAS a problem with the 3.0Gb SATA interface on the MacBooks.
In any case, I repeat my request. Can someone with one of the new (June 2009, preferably the 2.8GHz entry-level model) 17" MacBook Pros check and see if the SuperDrive is running with a PATA interface. Check with Apple's Disk Utility, not with the system profiler.