Yes, although the judges votes do count - after the judges finish, the couples are given a score reflecting their position, so bottom couple get 1, next 2 and so on. Then the public vote and the same thing happens, with 1 for the bottom in that order. The two are added together, so if Ross got the lowest public vote his score this week would be 2.
So a low judges vote can make a couple's position dangerous if they are not getting a stellar public vote