Have no addon's on PTR, and not sure how to get the coords to work, will jump over to live and enter some more data.... just doing some more testing here on the PTR for a bit.
EDIT: OK, I have only found them 3 times, and today only, last 4 days I have not seen any. 9am CST (Missouri). Was in Scourgeholme and flew just a bit west to area that shows "The Broken Front". That area there I have seen 2, tamed one and let another guy get the 2nd one. Both poor quality. This is also the area that is shown in the pictures all over the net. Coords are about 74.0 x 64.9
2nd place where I got another poor quality was west of Icecrown Citadel, down on the lower area on the ground. This was about 9:15 CST or so. Coords were 47.9, 86.6 , same area where High Thane Jorfus was walking around.
Spent alot of time in The Storm peaks in the Valkyrion area, thinking it would be a logical place for them, but never seen a one.