Without knowing what's actually going on internally that's just a snap judgement. If the engineers are actually being pressured to achieve it in too short a time then sure, however it's quite likely that "mad at [him]" means in a friendly way, and he's going "would love it if you can prove me right, otherwise don't worry, I'm already telling the press that I was an idiot who spoke without checking with you, so if we're late then it's not a problem".
Really? I know this is a subtly different thing but is it possible to name a company that has always delivered what it said it would when it said it would? Apple would be my nearest candidate, but they have messed up here.
