I haven't time to read the piece right now, but the preferred density of troops in WW2 was something like a division to a few miles of front. That's what? 20,000 men to choose from?
Yeah, it just sounds so fantastical. He averages killing 7.5 people per day, but how? He was using WWII technology so what was his effective range, maybe 500 yards? So now your a Soviet grunt standing there and your buddy next to you gets the right side of his head blown off. It doesnt seem like too much of a stretch to determine that the sniper is within 1500 feet to your left, lets send the other 19,999 men swarming over there to kill him. Im sure he was awesome, Im just not sure he was that awesome.