its not gonna fall out of the sky at white bug speed Vmlb0, but one must maintain low bank config to avoid getting close to stall speeds at higher bank angles.. Atr42500 has the same procedure, at acceleration alt, one needs to accelerate to white bug n then maintain that till what ever u want to climb at.. white bug is also the best angle of climb speed so i think it would be the best to avoid any obstacles.
The drift down speed is also white bug n hence it proves its significance.