Why does Pinky see you 15 seconds ahead of the stream?
Because she’s Cortana —an AI that lives in my ear— and therefore keeps me updated when someone enters the chat, looks up facts on Wikipedia for me, and so on. Everyone else sees the stream relayed through —and thus delayed by— Telegram, while Pinky gets her feed directly from my machine in near-real-time.
As a result, she’s effectively living 15 seconds in the future during the stream. Like a Doctor Who character that didn’t make the cut.