Originally Posted by
Mythicalfury
from recent comments on wowhead, it would appear to be yes.
It is *possible*, although far from confirmed, that the spawn timer of TLPD was changed recently, alongside Poseidus and some other world rare spawns. A group of approximately 8 of us has been working together when we've been online to track this down and to the best of my knowledge we only missed 2 total spawns of either Vyra or TLDP in a 6 day window.
Our theories over the course of this adventure that ***may or may not hold true***:
1. The window appears to be 4-8 hours