Ok so I tried yesterday EU exp-off:
Tagged random BG, showed "unavailable" and got a pop after 4 minutes. Then I came in a bg with a team of hordies with mix of blue quest gear and 64s with BtA gear. In front of us was a team bg with BiS fotm classes (only warriors, mages, disci / shadow priests). They got 4 bases and farmed us at GY during the all BG. 'Lame'. Everyone was like "wtf are those retards"
But it was really weird, felt like we were only 2-3 60 twinks on horde side. I never got a pop again after this one.
ps: i tried tagging@70 too, and it seems only random bg worked for me. When i tagged for AV, it showed <1 minute, then 3 min, then 6 min, then unavailable. When I was getting pops in 5mins before patch. So broken atm too I think.