Yeah. They also changed the mechanics of Growl. It used to scale with Pet's AP, but now scales with the hunter's AP.
I found it to be a slight buff to growl, but it's still not enough for my pet to hold aggro without waiting for a second growl.
I've begun to combat this by sending my pet in on one mob, and Misdirect another on to it. Of course, this can only be done every 2 minutes, but it still speeds things up- especially when you can throw enough threat onto your pet, that you can't pull it back off before the mob is dead. It gives a nice few extra productive seconds to let your pet build aggro on the mob it's actually attacking.