I believe you are wrong. There are few facts:
1. Intel claims that their boards, specifically DG965OT can be used with 'Core 2 Processors with 1066 MHz FSB' (check this
link)
2. Intel has made the Core2 E5xxx and Core2 E7xxx processors with lower FSB than E8xxx series, and these CPU's FSB are 1066, and 800 MHz, but their statement is that 45nm CPUs are compatible with 3x series chipset and later. Perhaps, a good reason to make these variants of Wolfdale is to make them available for older chipsets. But that's true only for
other vendors' boards.
3. Intel's CPU compatibility tool claims that Core2 E7xxx (1066 MHz) cannot be used with DG965OT motherboard. This can be checked
here.
4. Intel's support specialists from the agree that 'this combination is not tested'
5. Since I've asked them any details, Intel didn't update their DG965OT product specification page, and they did not include any statement regarding Wolfdale series Core2duo processors
Now, how can anyone explain that a motherboard which can be used with 'Core2 processors with 1066 MHz' cannot be used with Wolfdale-derived Core2s? The only answer I found is: they don't have enough resources to waste
TESTING a combination whch seems to be valid; or they are interested in selling only the new motherboards, so a customer won't upgrade only the CPU.
Best regards,