There were Russians there in January when I was at the Fiesta Palace, you should also take a trip on either the Outback Safari or Bavaro Runers, an excellent way to get off the resort, see the real Dominican Republic, around $75 US each for the day, drinks and lunch included. It is well worth it especially if your first trip to the DR.
You never mentioned where you were staying, review are available on this website and also at
http://www.debbiesdominicantravel.com/