McEnroe would've won that day with graphite, wood, or a frying pan. McEnroe said that for the entire tournament in '84, he was zoned. He said that in particular on the day of the finals, he woke up and everything around him appeared to be moving in slow motion.
Also, it should be noted that even when Connors endorsed the ProStaff, he still played the non-televised rounds of tournaments with his T2000. I remember seeing him in Memphis against Kevin Curren. Curren was playing with that graphite Kneissel and serving like a banshee. Connors was playing with his T2000 and returning more than he missed. It was an incredible display. You would basically hear two noises, the crack of Curren's serve, and a thud. The thud was either Connors return, or the ball hitting the backstop.
It is also very noteworthy that Connors was able to change rackets based on televised coverage. His equipment was customized, but there is no way the ProStaff could ever play similarly to the T2000. What it says to me is that while the pros play with customized gear, they could play as well with damn near anything.
I read an article some years back that was about Connors and his T2000s. The T2000 was a design of, I believe I'm right on this one, Rene LaCoste's back in the 60s that Wilson picked up and distributed. After Connors' success in 1974, damn near every pro was switching to the T2000. Connors hit the ball with unprecedented power off both wings. This is very much in evidence even today watching the finals with Rosewall at Wimbledon and the Open. There was a catch, however, Connors was able to knock the cover off the ball and keep it in. The majority of the rest of the world was not as lucky.
Wilson changed the T2000 from the configuration that Connors liked. So, Connors stocked up. When he ran out of that stock, he put a call out to anyone who might have had the same model. Billie Jean King did and gave what stock she had to Connors. From what I've read, the only reason Connors changed from the T2000 was that he ran out of them. I don't think money had much sway in the matter. If it had, he would've changed frames long before as the T2000 was obsolete (if you listen to the manufacturers, Wilson included) long before he finally put it down.
IMO, there will never be a sight as awesome as Jimmy Connors waiting on a ball to his backhand with his wrists cocked holding that T2000. It was like a hawk about to swoop down on a mouse.