I'm torn as to number, even with evidence and (so far) conditions...
On one hand, if the both fairway and greens firm up (as they are correctly saying on TV, not speed up)... scores will congeal on more traditional WF numbers (E 280+/-).... yet I'm also seeing something so telling about the bashers in "defeating" double bogey danger they would otherwise face...and I'm not just talking DeChambeau. When you can defeat 3 inch birds nest rough and the obliquest of angles to wickedly sloped greens, running away with a Gap Wedge from 127... the other 11 clubs are rarely used.
I'm going to split the baby and say -4 (276)... an average for the winner of -1 under a day. The pressure of the major win will get all but two or three of them, and the WFW we're used to will be awaiting those Sunday nerves, which is different than Thursday's focus.