Yeah, basically what the title states. Some of the presents have skritt way over the area level, but it seems to be consistently tied to the one present spawn – its not random.
Also, for the record, even if you are level 80 and fully exotic geared, level 31 skritt in a level 11 zone (this was in ashford, near the prior heart NW of AC) will flatten you very easily. I found this out. For science. And Anet successfully removed 3 silver from the economy. >.>
I heard reports of a level 69 skritt present in ashford, but could not confirm its location at this time.