At ORD a few days ago, the airplane was deiced at the gate. My inbound flight was highly delayed waiting for the gate to open, for about 1,5 hours. Then the next flight was late to the gate for the same reason. I arrived at my destination 5 hours late.

Stationing deicing equipment in one place is better. I was also wondering about employees in the gate area. Deicing fluid is slick / slippers and nasty.