DS 5535 for B1 Visa. Processing time

Hi everybody,
I applied on September 20th for a Visa (typ B1). The interview lasted less than 5 min. I was very surprised, as I realized that the officier has finished the interview. he gave me my passport back and he said that I will receive an e-mail. the same day I got the e-mail with the form DS 5535. I filled it out and sent it back on September 21st.
my questions:
1) how long does the processing last ?
2) is it a bad sign to get the passport back ?
thanks in advance

Processing time is at the discretion of the consulate. It is basically a recheck of your petition. Fill it out correctly, double check and submit it.