Inquiring Minds Want To Know

Having done the Coren Direbrew event on several characters over the past few days, I've got a serious question.

What's up with bear tanks?

It seems like every bear tank I've had in the past few days has exhibited the characteristics of a kid with ADHD in a store full of teh shinies.  While I expect a tank to move a bit, these guys have bounced around the room like a superball.

One bear tank bounced from the front wall, to the center of the room, to the back wall, and then back again.  That was the most extreme case, but every other bear seemed to move juuuuuust far enough every 4-5 seconds to take Tal out of melee range, or drag Corn on top of Aeth, or just move because... well, I dunno.  They didn't like the view?

Seriously.  Is this a change in the tanking style/ability for bears, or have I just encountered a cluster of jittery caffeine addicts?