Thread creep again...but,I think many of us,up there,like to see our fellow pilot opening the speed window,and reducing speed,when the going gets slightly more than rough.
For instance,when going for the suckers gap,that so often closes up,it gives us the feeling that our fellow pilot is thinking in the right direction.
When I sit in the tops(if I can't avoid them), and my colleague does nothing with the speed window,as the Mach increases to .87 or .88, I find myself having less than respectable thoughts.
As many have pointed out here,the above scenario will,99.9% of the time,not result in severe turbulence....but,that is not how we operate,is it!
We hope for the best,and plan for the worst...