Gatbusdriver
When stationary the AoA vane, which is pivoted, will be at an angle to the ground. The vane requires airflow over it to give accurate readings, I would therefore humbly suggest that the actual airspeed required for an accurate reading is 60kts.
Gatbusdriver, welcome to the fray. During your training, have you flown in ALT 2 law, or are you on the little Airbus? We are drafting all able bodied bus drivers to try to answer this question.
My personal experience with the USNavy peg, cone and vane type AOA sensors is that they would come alive in a definite breeze, perhaps 10 knots. A vane type that needed 60 knots to be reliable would be a sticky one in my book.