My thoughts exactly. Why do you think the game puts the spies at an advantage? Sure the last two games have went that way, but its far too small a sample number to comment on. What's the ratio of results like on the original forum(s)?
The Resistance has far less room for error as with the one exception, missions fail with a single sabotage.
The Spies also know each other, so they can act with a bit more security than the Resistance. While no PM means they can't truly coordinate in the usual sense, the can make safer guesses about how things will unfold.
I don't really know what things are like in other venues.