Why does McShay and Kiper keep calling Cordy Glenn a tackle?

Have they not watched his film? He's slow to the edge, doesn't handle speed well, doesn't move as fluidly as an NFL OT, and doesn't have the long frame they have. Cordy Glenn is a great RG. He's proven that over the last few years, including last year when he was a mediocre LT. Glenn and Decastro are potential All NFL OGs over the next deacde or so. Neither one should be described as a tackle.