Congratulations!
Were there any conditions whatever? Did you show a HK ID card? Did they look through your passport for previous China visas? Did you get an L or an M, and did you need tickets or reservations or any other suppporting documents? Did they seem to be turning any Americans away?
My memory is sometimes off, but I have a vague recollection that there was a time long ago when the HK visa office did not like brand new passports because they didn't have a HK entry stamp (now an entry slip). Applicants first had to go to Macau and re-enter Hong Kong to get the stamp. If there still is such a policy it'll be a hassle for the many who are going to start showing up at the visa office in two or three weeks with their new ten-year passports.