If he's not hurting himself with the crying and temper, I wouldn't worry about it. He's frustrated because, as you say, his body hasn't caught up with his mind. It will be a problem for some time.
DS as a baby would get so frustrated at not being physically able to do something his brain wanted to do, he would bang his head on the floor, the wall, the furniture. He had a perpetual bruise on his forehead for at least a year (from that and, well, falling into the coffee table). I found that if I went to him, took his head in my hands and pretended to bang him into whatever it was, while saying "bang! bang!" dramatically, he would start to giggle and get sidetracked from the actual banging.
Oh, and I likely ate a lot of chocolate, too.
