Schwartz definetly influenced the jury. Oracle are trying to block him right now
"Although the former Sun CEO Jonathan Schwartz testified in Google's favor, saying the company never had a problem with the Chocolate Factory's implementation of Java, the jury seems unswayed."
That's not what happened.
They answered YES to 4a: the jury did believe Sun 'never had a problem' or at least told the world there was no problem. Oracle are fighting to keep Schwartz from testifying in the next phase because the jury WERE swayed by his testimony. With the evidence that's since emerged about how official the blog really was they're right to be scared.
4B really is a trick question. Not a ruling, just an opinion for the judge to consider and compared to 4A pretty minor, if only because the burden of proof was on Google to prove it, not Oracle to disprove it. Would have been nice to have but 4A did the damage.
Ultimately, if Oracle don't beg for a settlement before phase 3, the 4A result also applies to the patent claims and can only reduce any payout the jury decides. There are only 2 ways to kill a patent suit, prove you aren't infringing OR get a low valuation on the infringement: looks like Google have a low valuation coming.
Said it at the start, I expect Oracle to spend more than they win. Or put another way, Google saved nearly $7.4bil when they chose not to bid against Larry Ellison for Sun. Sun should have taken the chance to be relevant when they had it, they wouldn't have needed to sell to Oracle if they had.