Actually the turtles do have tails by the original comics
And it's looking cool man, a few suggestions though, make the fingers a tad shorter, they are not too "bulky" though.
Make the biceps longer and from the side view the top leg looks very thick and wierd on the front.
You are aware of the poly flow so there's no need for any of us to say anything about it ;] nicely done so far, keep it up man