Not really. As I said it's a reasonable assumption that Darkness would switch, and the options are very few. Basically only Death and us would agree to a swap like that. The weaker teams wouldn't switch to a stronger team, we wouldn't switch with them to a stronger team, and Death and Aether still have several deck options open. Darkness wasn't likely to agree switching with a stronger team.
There's more to words than literal meanings. 99% of the time, someone is just sure of himself when he says he knows something.
Of course, there's nothing stopping Darkness from telling Time about the swap. I personally find speculation useless since this -is- a war of deception.