Jeez Mixture, what did I do to deserve a reply like that?? What exactly about my question wasn't clear?
If I am evacuating a plane, trust me I'll be sure to glance, however quickly out a window to see what's going on. Not linger, loiter, stare, rubberneck or otherwise slow down or impede evacuation. And if my glance is while the aircraft is still moving, that again will not hinder anything but I will be gaining valuable information myself on the environment into which I am about to go.
Besides, it wouldn't be the first time crew have made errors in evacuation. Didn't the pilots of Asiana 214 initially tell passengers to stay put after the crash landing ...