The hard part is over. Sending your loan to the USDA is actually just a formality. Your loan has to sent to the USDA for loan guarantee or commitment. Since you are in CA this should process should no longer than 3-5 working days. I am pretty surprised to hear how difficult your loan process was. USDA loans are the simplest and easiest loan someone can qualify for. We don't need tax returns unless your are self-employed, just your W-2s, and the condition of the property is not nearly as stringent as VA or FHA. The majority of my clients are baffled at how smooth the process is on these USDA loans, given the fact they have heard all the horror stories from their friends about their loan process. It's strange, the USDA loan program is so easy, I am closing people with previous short sales with multiple lates on their mortgage after only one year. I guess it comes down to who your Loan Officer was. Clean file going in, clean approval, smooth sailing.
Best of Luck!