In my experience, yes. It takes a lot of practice and limb coordination, mainly to designate an independent role for each limb whilst keeping the big picture in mind. When playing a polyrythm the drummer must be able to focus on each limb individually without breaking the flow of whatever else is going on. If one isn't careful, it will sound like a mess, but played well its damn impressive and sounds really nice too.
Another video for you to check out, he definitely explains better than me :