you misread the article. nobody said PM or supply was leading meetings:
"I've been told that any meeting of significance is now always populated by project management and global-supply management,"
...populated, not leading. and of course theyre at the meetings -- they likely want a jump start on planning and sourcing. since Cook became supply chain extraordinaire apple's warehouse stock has dropped dramatically, which is a good thing. JIT supply chain management isnt easy.
When I read that, my first thought was: 'What? They had important meetings and didn't invite project and global supply management?'
I doubt that was the case; and if it was, then up until now they've been lucky.