Well, the difference in attitude is basically down to why that AO final was so significant (some dubbed it the most significant slam final etc). Had Nadal won the AO, he would have looked a sure bet for RG (which he did win). So it would have been 17-16, way too close for comfort. As it was, he didn't and Fed opened up the gap so that even post Nadal's La Decima, the gap remains what it was before 2017. So it's not so much that all Fed fans are over confident this time (which some are) and a few like Beatlesfan have been vocal about their anxiety. It's that Fed fans are chilled out in the knowledge that whether he wins this Wimb or not has little bearing on the GOAT race. Now if Nadal won USO, the anxiety would return. Also, since AO, it's become clear that Novak's slump is more than a blip so Fed's record seems, at least for now, safe from the challenge of his nearest competitors. Whether this is permanent or a passing phase of near-invincibility (kind of like 2009 from RG onwards up to the Soderling loss in 2010 RG) remains to be seen. When Fed lost to Delpo at USO 2009, the fans weren't so bothered since somebody had already taken care of Nadal (as somebody did this Wimbledon too). Ever since Fed passed Sampras, the significance of each additional slam is limited to the extent that it helps put the record further out of reach of Nadal.
As for me, I would love for Fed to win this but the air of complacency, which is now spreading to the media, is so thick now that I wouldn't mind a shake up.
