As a guy whose golf fandom is all about the majors, I am extremely impressed with Jordan Spieth.
Here's the slightly odd thing though: although I watched a chunk of the tourney on the weekend - and certainly saw quite a bit of Spieth - I still don't think I could pick him out of a line-up. (I also had to look up just now if his first name is Justin or Jordan.)
If someone asked me the question, could he replace Tiger?, I would have to say no. Good golfer obviously. Maybe great.
But no presence (for me.)