I don't think so! The writers have always stated that this show was never based on science fiction. But, it was one of the theories that had been tossed around extensively on thefuselage.com and I've seen in past episodes that they've incorporated ideas from the fans into the show. I still believe this is some sort of cover up experamental thing.
I'm glad to see that they've finally gotten back to the excitement that this show started with. After the hiatis over the holidays, I was really questioning whether I'd continue to watch as the show was becoming "boring".
I've read some exciting spoilers about the last few episodes...but, spoiler tags don't work on this board, so I'll refrain from saying much.