I love them outright denying it, then slowly admitting that the slides reference real elements of their infrastructure that they have since retired.

This dump is a few years old. Seems very believable that the NSA compromised their network before 2013 in the way the slides suggest. Plus if their "internal Security Unit" was worth a damn they would have known about this already, rather than finding out about it from this dump.

Overall that press release is a little embarrassing, and screams to the tech illiteracy of their senior management. Nobody would publish a press release like this so quickly if they understood the problem scopes in play here (e.g. their Cisco firewalls themselves could have implants!).