Dialing hashtag (#) after the number as mentioned will send the number immediately, but you shouldn't have to do this. My delay is around 4 seconds and has always been this way, whether I dial local or long distance using gv on my obi200. The delay is in the settings somewhere but again you shouldn't have to touch it.
I would suggest and you should start here is to completely reset your obi back to factory, reset the obi up through the dash again. IF you still experience the delay before your dialed number is sent then something else is at play.