To be honest I don't know the specifications of what causes the triggers to "wakeup" the speedlights from sleep mode, I just know that when I used them in a "real" life situation, they did. I know that the V2s did not, so I am use to having to wake up the speedlights manually.
On another note, how do you like the 7D and it interactivity with the speedlights? I have been thinking about moving up to the 7D but have not had a chance to get my hands on one to play with it.

