Hints that Ruiz will be the center; McCoy sliding to guard (here's why)

1. Prior to the draft, there was discussion that the Saints weren't thrilled about Eric McCoy's ability (or lack therof) to make all of the calls & adjustments on the O-line. The coaches gave him top marks in all areas EXCEPT in his ability to realign the O-line based on the opposing defensive front. Not alarming, but this was a concern.
Could somebody link me to this pre-draft discussion? Maybe I just didn't pay any attention, but the first time I heard anything about the line calls was twelve hours ago. All I heard was that the Saints wanted to address "interior OL."