It's very interesting to know how such a rumour would start if some many people were whispering about it.
I said it before so I'll say it again - in 2011 only half a dozen people knew two episodes had just been found and they kept that secret for six months. Granted 90 episodes would be a different story but I can't see how so many people 'who are close to the discovery' or 'in the know' would openly mention it.
If I found an episode I'd contact Paul V straight away and speak with him only. Arrange shipping to the BBC with him only. I'd be biting my tongue every day I'd come on this forum but there's no sense ballsing it up ahead of time. There's a notion - be it right or wrong - that fans think they have the right to demand to know immediately when something has been found.
Just wait for the official announcement, and if Paul/Steve/Her Majesty the Queen says it's not true then believe them