Angle of the dangle accuracy?

DemoDoll

Hello ladies! We had our NT scan done today and the u/s tech guessed at our gender according to the angle of the dangle. Just wondering if anyone else had an u/s tech guess at the gender based on this theory and if it was right or wrong? 

We definitely aren't going out and buying anything or painting the room, just curious to see if this guess is accurate or still about 50/50.