Unfortunately, yes. I had no warning or knowledge of "landsharking" prior to my pup. I knew puppies bit and chewed, but this was a whole new level of bitey terrorism. My hands were a mess! He's almost 4 months now and he is so much better, but still has moments now that teething has entered the picture. We redirected to toys. This is constant, we couldn't let him get away with anything. The toys had to be fun or else he would come back for us. If he was being a major brat, he was put into his kennel until he was calm or fell asleep.
It gets better, just be patient and consistent. He'll still get you occasionally, but give him a toy and play. My pup, at 4 months usually only gets me when we are playing, accidentally. Or when he's jumping toward a toy or something and his aim is off. I will have scars, and memories, I guess. >.<