Most operators when possible drift slightly north across to the Frankton Road side to then ride the updraught (cloud permitting) on the northern side of the arm after getting airborne, thereby getting out of the area of sink as soon as possible.
Maybe in your ATR GD but not in a 738 with 60 POB.
There is no ¨drifting¨anywhere on that departure in a 738, you maintain track until it's time to turn and then you turn. Gaining lift from an updraught certainly doesn't help, most of the time you're in V/S in order to reduce your rate of climb, so I don't think thats a valid scenario.