Logically, it seems it should effect it, unless both players are pretty equally rated... Obviously it shouldn't have as much effect as a win or loss. Clearly if a 1200 rated player achieves a draw with a 2400 rated player, their 1200 bkr should go up at least a little.
As other people have pointed out in the past, in many cases it is probably such a small change that it doesnt change the # we see. (as it doesn't go out any decimal points.)