What evidence would that be Terry?
Vivek,
I can go back and dig up the interviews at the launch time. At launch, Panny had a camera ready to go (it was in the hands of reviewers for Previews). They had lenses ready and a lens line-up and time table. They had the EVF sorted out for still photography, and announced they were working on video.
In addition if you read some of previews, like at DPReview, they had been speaking to Panny about the concept and what they were working on for a while.
I will contrast that with Oly who had zero to show and talk about at the launch. They came up with a non working prototype and no time table at Photokina, haven't discussed anything about an EVF, still have said nothing about a lens lineup. etc.
When you look at the diagrams of the register difference etc. Everything being shown is Panasonic.
So, can I say with absolute certainty that Oly didn't dream it up and are really the leaders here, no but all evidence I have seen leads me to my conclusion.
If you come up with other info, I can be convinced that Oly is the leader.
Terry