Eh...a good tech with good equipment can almost always predict the correct gender early. My tech at my OB said that she tells people the gender all the time at 14 weeks - which is when I found out this LO is a boy at an elective u/s place. I knew several people who had gone there and got accurate results so I felt really confident.
The angle of the dangle is a real thing, though, but is mostly used from profile shots. If the nub is parallel with the spine - girl, if it curves up - boy. To someone just looking at an u/s a 14 week baby girl will look like she has boy parts from most angles except the potty shot, though, which would show 3 lines. I say post a pic of the potty shot you got!