I just got done flying DL966 (SEA-ATL) and it was a little intense on the climb out. However, I faced a nice tailwind on the way out and got into Atlanta over 30 mins early!! I did a scheduled 4hr 41min flight in 3hrs and 44mins. The tailwind was 135kts. Other than that, the winds eventually calmed down to about 75kts then 55kts which was way smoother than 135 lol.