Year after year players swap from their long term club sponsor and each time people say it won't matter, they will just give them the same spec of club etc. Somehow the evidence doesn't seem to back this up. I think Rose did well, may even have won, in his first tournament with these but he didn't have consistency during a lot of last year. No doubt he trousered millions still but in comparison to how well he had been playing last year was a dip still.
There may have been other factors in play but the club change can't be ignored.
I too noticed Rosie was playing what looked like a SIM driver. I've never understood why players change equipment just for money. I remember when GMac left Callaway right after winning the US Open .He seemed to disappear right after that happened (I'm glad he's back btw). I know these companies will build sets to each players specs, but with today's purses most don't need the contracts. Also, I'm not sure the public buys clubs based on who is playing them as much as they did in the past. It seems like Taylormade and Callaway dominate on the tours today. I feel sure it helps their sales. Ping, Titleist, Cobra and Cleveland/Srixon have their players, but not as many. Another factor is that Homna and PXG are pretty pricey. Maybe their players are helping them sell their clubs. However, I don't see many if any sets at our club.