Turnaround for drafting a petition is typically about 3-5 business days from the time I have all relevant paperwork and payment, including a cost deposit for my trust account. 

Here in Santa Clara County, I can often obtain a signed order the afternoon I submitted the petition in the morning.  The only time there may be a significant delay is if the Probate Examiner is out of the office ill or on vacation, in which case only emergency ex parte petitions are granted by the Probate Court.