1.- Enter 1vs1 queue.
2.- Die. (I have tested at PvP, don't know what happens if you die by PvE with nui's debuff and so).
3.- Don't release, wait until you find someone in queue.
4.- Accept when you do.
5.- Release, you'll appear on the field without having to wait the preparation time.
6.- Profit! Now you can gank easy as daggerspell or darkrunner.
EDIT: **** I have the browser in the exploit section but I did the post here, some admin move this plz.