Was the Eurostar delayed, does anyone know?

My experience was good: on my way in Paris -> Brussels arrived 10min early, and on my way out Brussels -> Paris I had ~15min delay (apparently because Police had to board the train before Brussels).

Eurostar was fine for me. Getting to the Eurostar within Germany apparently sucked for some. But I took a later train and didn't have issues there either.

No, I don't think Eurostar was affected at all.

Worked for me from Amsterdam.

Not for me.