Very unfair to comment on whether the right or wrong decision to evacuate. For a start there is usually no right or wrong, it was just a valid decision, on information available to whoever ordered the evac (if anyone).
Injuries: I would expect 1 or 2 serious injuries from an Evac - that is my "expectation", and by serious, I am probably tending towards broken limbs etc. We'll see later (after the pPrune instant enquiry dies down) how many of the 15 only have a small sprain / abrasion / just enough for a lawyer
So really just echoing Jasavir
NMoD