A) I didn't deny it was slower. The conditions are clearly playing slower.
B) Yeah, a commentator who's an all time great but doesn't compete anymore. Meaning he's talking based on a comparison with whatever balls he practiced with or played doubles (if he indeed did) with 12 months ago. So yeah, I'll go ahead and wait for players that are actually active and played a substantial amount of tennis last year to comment on the issue. Nothing crazy about that. So this constant crying by Fed fans here is based on a casual hitting session that McEnroe engaged in? OK there.
Again, I am not saying the balls were or weren't changed. I'm saying when something like that typically happens, we get confirmed reports... as opposed to old timers hitting the courts for a bit.
As for your second paragraph... do you hear yourself? I thought it was Nadal fans' specialty to rant like children (no offense but you guys should check this thread again and read some of the stuff you've written).