The 910 D3 and the 913 D3 are not draw biased.  The 910 D2 is more draw biased than the 913 D2.  Please note, when we say "draw biased", we are not talking about face angle or heel weighting.  The face angle of all four drivers is .5 open.  We are talking about the internal CG being placed a little further back in the head, which adds to the stability and forgiveness and also makes the head easier to turn over right to left (if you are RH).  That is what we are calling "draw biased".