Thats the slant technique. And I would say it's really more of scheme issue than a postional coach issue. But hey, feel free to write Denny or Clancy an angry letter about it. I'm not a fan of it ether
I'm not sure I understand the reasoning behind the "cocked NT" concept. I have seen it executed badly by us during the past 2 seasons.
Sometimes the NT will be angled too much so that he lacks leverage so that opposing blockers find it easy to keep moving him in the direction he's pointing at while the RB barrels behind him through the gap he's being moved away from.
It's probably even more complex than that. Because when we see the NT slanting (or being slanted), we don't know if the defensive scheme calls for another player to protect the vacated gap.
Similar thing happens when you see a DE slant toward the center and lose outside contain. We don't know whether or not the scheme calls for a LB or CB to have outside contain or whether the DE simply blew the assignment.