What information in the P0 blog posts on this topic was false or misleading? I read Apple's response, then I read the P0 blog post, but I don't see anything in Apple's response that actually rebuts anything that the P0 blog post said about this vulnerability.

Apple says "Google’s post ... creates the false impression of 'mass exploitation' to 'monitor the private activities of entire populations in real time,'". But Google's post doesn't do that. Those sentences occur late in the blog post, and aim to educate about the risks posed by software vulnerabilities in general, not these specific vulns. That is abundantly clear from the text. The only way to get the impression that Google was doing otherwise is to merely skim the post.

It seems like Apple is mostly annoyed that the press latched on to this, although honestly I question how much it matters since nobody seems to pay any lasting attention to these types of stories anyway.