We've spent a week in the lakes - Sunday was sunny, and I took a lot of shots with the Leica M . . . . . . . then it wasn't sunny.
I understand that Ming Thein has shot his E-M1 the shower, others have poured water over it - whatever.
Well, I've spent something like 15 hours this week in pouring rain / sleet / hail at temperatures around 3 or 4 C gale force winds (and another 15 hours threatening rain), The E-M1 with the 12-40 has been over my shoulder all the time, at one point it had turned turtle, and there was a pool in the lens. other times it's had water streaming off it. The real problem was keeping a lens cloth dry enough to wipe the rain off the lens. . . . I was a little worried as I'd lost the hot shoe cover.
Nobody kept dry - expensive Norwegian jackets let the water through - two different LowePro backpacks leaked, leaving an M240 in a pool of water in the bottom (undamaged).
My E-M1 is now really clean and shiny, and it worked perfectly and seamlessly at all times, no hangups, no hiccups, so I guess one can say that the weather sealing really works. Soakproof indeed!
all the best