What's the truth about viewfinder brightness?

It's interesting that something that is measurable hasn't been measured. D800 users see many subjective things, and one of those is the "big bright viewfinder". Funny, but I'm pretty sure the D800 viewfinder is darker than the one on my D300. It seems that Leonard Shepherd agrees (http://forums.dpreview.com/forums/post/42471967), and I'd hate to think that on the rare occasion when we agree we're both wrong.

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Jim