We have 20 mins for our contractual requirements & fortunately the :"fat controllers" (bless their hearts) rarely enforce it as there's often issues that would blow that almost unrealistic time limit out the window. Less than 5 mins is simply not doable, takes that long to get dressed !
I personally believe that being woken in the middle of the night & be expected to be ready in 20 mins never lone 15 is dangerous (OH&S) & if an accident could be attributed to that fact then a Coroner I reckon would have a field day wanting some blood (no pun intended)! Remember we are talking about SP here not RW where there are two crew (for our Ops anyway). Common sense prevails thank God for us!
Wmk2