1. This quote is clearly meant to exaggerate reality, and they are likely including things like fully automated CL/PR's which have been around for a decade as "AI generated".
2. I stated before that if a team of 10 is equally as productive as a team of 8 utilizing things like copilot, it's fair to say "AI replaced 2 engineers", in my opinion. More importantly, Tech leaders would be making this claim if it were true. Copilot and it's clones have been around long enough know for the evidence to be in, and no one is stating "we've replaced X% of our workforce with AI" - therefor my claim is (by 'denying the consequent'), using copilot does not materially accelerate development.