Gender at 15 weeks ?

Amelia
I will be 15 weeks Friday. My mom is coming down from Houston for the weekend. She is stressed about missing my whole pregnancy due to me being 16 hours away. This is her first grandchild. I am going to surprise her with a 3D ultrasound and find out the gender Friday!! The U/S Tech told me that he has been in this business for 15 years and he is pretty sure the gender will be accurate. Anyone else find out the gender of their baby this early?